Forensic Investigation of Crimes Involving Diseased, HIV-Infected, and Influenza-Infected Individuals: Protocols, Challenges, and Integrated Strategies

Forensic Investigation of Crimes Involving Diseased, HIV-Infected, and Influenza-Infected Individuals: Protocols, Challenges, and Integrated Strategies | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Systematic Review Forensic Investigation of Crimes Involving Diseased, HIV-Infected, and Influenza-Infected Individuals: Protocols, Challenges, and Integrated Strategies Lakshya Bhardwaj, Vaishali Vardiya This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8569968/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Background Crime scenes involving biological hazards from infected individuals, such as those with Human Immunodeficiency Virus (HIV) or Influenza, present unique challenges that transcend standard forensic protocols. The intersection of virology, biosafety, and criminal investigation necessitates a specialized, integrated approach to protect personnel, preserve evidence, and ensure judicial integrity. Aim This review aims to synthesize virological data on HIV and Influenza with core forensic principles to develop a comprehensive framework for the safe and effective investigation of crimes where such pathogens are a factor. Methods A descriptive review methodology was employed, integrating data from virological studies and source materials detailing Influenza and HIV with established forensic science literature, biosafety guidelines (WHO, CDC), and legal-ethical analyses. Results We proposed a tiered response protocol anchored in risk assessment. Key challenges identified include the conflict between decontamination and DNA/RNA preservation, the interpretative complexity of viral load and strain data as evidence, and significant ethical-legal dilemmas regarding health privacy. HIV, as a stable bloodborne pathogen, requires stringent blood precautions, while Influenza, as a labile respiratory pathogen, necessitates aerosol control. Conclusion Investigating crimes involving infected individuals demands a multidisciplinary strategy. The study recommends the adoption of standardized operating procedures (SOPs) that balance biosafety and evidence integrity, continuous training for crime scene investigators (CSIs) in bloodborne and airborne pathogen risks, and clear legal frameworks to guide pathogen testing and information disclosure in criminal cases. Forensic Science Biohazard HIV Influenza Crime Scene Investigation Biosafety Virology Figures Figure 1 Figure 2 1. Introduction The primary mandate of forensic science is the unbiased analysis of physical evidence to reconstruct events and establish links within the judicial system. This task becomes exponentially complex when the evidence itself, or the individuals involved, poses a biological infection risk.¹ Crimes such as sexual assaults, homicides with significant bloodletting, assaults with weapons, and instances of bioterrorism or malicious transmission can involve perpetrators or victims infected with communicable diseases.² Among these, HIV and Influenza represent two potent yet virologically distinct models: one a chronic bloodborne virus with profound social stigma and legal implications, and the other a ubiquitous, rapidly evolving respiratory virus with pandemic potential.³,⁴ Current standard forensic protocols, while addressing universal precautions for bloodborne pathogens, often lack the granularity required for pathogen-specific threats.⁵ The virological intricacies of these viruses-HIV's transmission through specific bodily fluids and Influenza's modes of spread via droplets, aerosols, and fomites-are well-documented.⁶,⁷ However, the translation of this virological knowledge into actionable forensic practice is not well-documented. Investigators face a triad of critical challenges: ( 1 ) mitigating occupational infection risk, ( 2 ) collecting and preserving evidence that may be contaminated with viable pathogens without compromising its analytical value, and ( 3 ) interpreting the forensic significance of detecting a pathogen at a crime scene.⁸ This paper therefore seeks to bridge this gap. By integrating detailed virological profiles of HIV and Influenza with established forensic science principles, we aim to construct a structured, pathogen-aware framework for crime scene investigation. This review will delineate specific protocols, discuss interpretative and legal challenges, and propose integrated strategies to safeguard both the health of forensic personnel and the integrity of the justice process. 2. Review of Pathogens: Forensic Relevance of HIV and Influenza 2.1. Human Immunodeficiency Virus (HIV): A Persistent Bloodborne Challenge HIV is a lentivirus that attacks the host's immune system, specifically CD4 + T-lymphocytes.⁹ Its forensic relevance stems from its primary transmission routes: direct contact with infected blood, semen, vaginal fluids, and breast milk.¹⁰ From a crime scene perspective, dried blood represents the most stable and common source. Studies indicate that HIV can remain viable in dried blood at room temperature for several days, though infectivity decreases over time.¹¹ The virus is enveloped, making it susceptible to common disinfectants like sodium hypochlorite (bleach), ethanol, and hydrogen peroxide.¹² A critical forensic consideration is the impact of Antiretroviral Therapy (ART). A suspect or victim on effective ART may have an "undetectable" viral load in plasma, drastically reducing transmission risk via sexual contact (the U = U principle).¹³ However, this does not imply the absence of viral genetic material in evidentiary stains. Proviral DNA integrated into host cells within a blood or tissue stain may still be detectable via sensitive PCR assays, offering a potential forensic marker independent of circulating viral load.¹⁴ 2.2. Influenza Virus: A Volatile Respiratory Hazard Influenza viruses are segmented, negative-sense RNA viruses of the Orthomyxoviridae family, with types A and B being most clinically significant.¹⁵ Their forensic relevance is tied to their efficient transmission via respiratory droplets (> 5 µm) produced by coughing or sneezing, which can contaminate surfaces (fomites), and via smaller aerosol particles (< 5 µm) in poorly ventilated spaces.¹⁶,¹⁷ The stability of Influenza on surfaces is variable, lasting from 2 to 8 hours on non-porous materials like steel and plastic, but less on porous surfaces.¹⁸ It is susceptible to disinfectants, heat, and ultraviolet light. The high mutation rate of Influenza, through antigenic drift and shift, presents a unique, albeit theoretically complex, forensic possibility.¹⁹ In a closed-scenario investigation (e.g., a kidnapping in a vehicle), could the viral strain recovered from a tissue or air filter be genetically matched to the strain infecting a suspect? While technologically feasible using next-generation sequencing, the ubiquity and rapid evolution of influenza strains would make such evidence highly circumstantial unless a rare or unique strain was involved.²⁰ Table 1 Forensically Relevant Characteristics of HIV and Influenza Viruses Characteristic Human Immunodeficiency Virus (HIV) Influenza Virus (Types A/B) Primary Route of Forensic Relevance Exposure to infectious blood, semen, vaginal fluid, or breast milk via mucosal surfaces, percutaneous injury, or contaminated sharps. Inhalation of virus-laden respiratory droplets or aerosols, or self-inoculation via fomite contact (hand-to-face transfer). Persistence in the Environment Demonstrates viability in dried blood residues at ambient temperatures for several days; survival extends in protected, hydrated matrices like within syringes. Retains infectious potential on non-porous surfaces (e.g., metal, plastic) for up to 48 hours; stability in air is limited to hours and is highly dependent on humidity. Vulnerability to Decontamination Possesses a lipid envelope, rendering it highly susceptible to inactivation by oxidizing agents (e.g., bleach, peroxides) and high-concentration alcohols (> 70%). Similarly enveloped; readily inactivated by common hospital-grade disinfectants, including alcohols, chlorine-based agents, and quaternary ammonium compounds. Molecular Detectability Window in Evidence Integrated proviral DNA, protected within host cell debris, can be amplified via PCR from dried biological stains for years. Cell-free viral RNA is less stable but may persist for weeks. Viral RNA may be detected by RT-PCR on environmental swabs for several days after contamination, but this often outlasts the period of actual infectivity. Recovery is highly matrix-dependent. Principal Investigative Implications 1. Presents a persistent, high-consequence bloodborne hazard. 2. Social and legal stigma may influence case dynamics. 3. Antiretroviral therapy can decouple detectable viral load from the presence of proviral DNA in a stain, complicating forensic interpretation of transmissibility. 1. Presents an acute, airborne hazard requiring respiratory protection. 2. Rapid environmental decay necessitates swift evidence collection. 3. Ubiquitous nature and constant genetic evolution severely limit the probative value of strain identification for source attribution. 3. Materials and Methods (Proposed Forensic Protocols) This section outlines a proposed framework derived from a synthesis of virological data and forensic best practices. The methodology is descriptive and prescriptive, designed for implementation by forensic units. 3.1. Initial Risk Assessment and Scene Management The first responder's initial report should trigger a risk assessment. Indicators include: the nature of the crime (assault, needle-stick injury, sexual offense), visible presence of blood/body fluids, reports of the suspect/victim being ill or diagnosed with an infection, or the setting (e.g., a drug use site, medical facility).²¹ Based on this, a tiered PPE protocol should be enacted (See Table 2 ). Table 2 Tiered Biosafety Protocol for Crime Scene Investigation Risk Tier & Designation Triggering Scenario Indicators Mandatory Minimum Personal Protective Equipment (PPE) Critical Additional Operational Measures Tier 1: Baseline Precautions Absence of visible biological material. No intelligence or contextual indicators suggesting an infection risk. Single-use nitrile gloves. Disposable shoe covers. Adherence to core hygiene practices (e.g., no touching face, hand sanitization upon glove removal). Tier 2: Fluid-Resistant Barriers Presence of visible blood or other bodily fluids. Common in assaults, homicides, or accidents without a known transmissible disease context. Nitrile gloves, impermeable gown or coveralls, full-face shield or safety goggles, surgical/procedure mask, and shoe covers. Implementation of a sharps management protocol. Restriction of non-essential personnel within the contaminated zone. Use of biohazard-labeled collection containers. Tier 3: Respiratory/Aerosol Protection Situations involving a suspected or confirmed respiratory pathogen (e.g., Influenza, COVID-19). Scenes in poorly ventilated, confined spaces where an infected individual was present. All Tier 2 PPE, with the surgical mask replaced by a fit-tested N95 respirator (or FFP2/FFP3, PAPR equivalent). Active ventilation of the space before and during processing, if feasible. Consideration of air sampling for pathogen detection in relevant cases. Decontamination of the respirator upon exit. Tier 3+: Specific High-Risk Pathogen Protocol Known involvement of an individual with a high-consequence bloodborne infection (e.g., HIV, HBV, HCV). Incidents with a high probability of percutaneous exposure (e.g., needle-stick assault). All Tier 2 PPE. An N95 respirator is added if a concurrent respiratory risk exists (e.g., the individual also has a cough). No reduction in fluid protection. Immediate availability of a Post-Exposure Prophylaxis (PEP) kit and established emergency medical referral pathways. Extreme, deliberate caution during the search for and handling of sharps. Double-gloving may be considered. Operational Rationale : This tiered framework is designed to be risk-proportionate and intelligence-led. Escalation is triggered by specific visual or intelligence-based indicators, moving from universal precautions (Tier 1) to pathogen-specific containment (Tier 3+). The protocol emphasizes that respiratory protection (Tier 3) is distinct from, and can be concurrent with, bloodborne pathogen protocols (Tier 3+). The "Additional Measures" column integrates critical risk mitigation steps that extend beyond PPE, forming a complete safety workflow. 3.2. Evidence Collection and Preservation: A Dual-Stream Approach A central conflict exists between the need to inactivate pathogens for safety and the need to preserve nucleic acids (human and viral) for analysis. The solution is a dual-stream collection strategy: 1. Stream A (For Human DNA & Traditional Forensics) : Collected first. Items are handled with care to avoid contamination. Swabs from stains are taken using sterile, slightly moistened (with distilled water) swabs and air-dried before packaging in paper. This minimizes pathogen viability over time while preserving human DNA.²² 2. Stream B (For Pathogen Detection/Survival) : Collected if there is a specific investigative question about the pathogen (e.g., "Was the HIV strain in the blood a match to the suspect's?"). This requires specific tools: o Viral Transport Media (VTM) : For swabs intended for viral culture or sensitive RNA detection (e.g., for Influenza), a swab in VTM is essential and must be kept cold.²³ o Direct Lysis Buffers : For PCR-based detection, swabs can be placed in buffers that lyse the virus and stabilize RNA/DNA, rendering the sample non-infectious for downstream lab work.²⁴ o Packaging : All biohazardous evidence must be double-bagged, with the primary container being leak-proof and puncture-resistant (e.g., a plastic vial inside a zip-lock bag, placed in a paper bag labeled "BIOHAZARD").²⁵ 3.3. Laboratory Analysis Considerations Forensic biology labs must have protocols for receiving and analyzing biohazardous evidence, ideally within Biosafety Level 2 (BSL-2) facilities.²⁶ Workflow should spatially or temporally separate the initial processing of potentially infectious items. Analysis can include: • Immunoassays : Rapid antigen tests have limited forensic use due to lower sensitivity, but could provide rapid screening information in exigent circumstances.²⁷ • Molecular Detection (RT-PCR/qPCR) : The gold standard for detecting viral genetic material (HIV RNA/proviral DNA, Influenza RNA) from evidence swabs.²⁸ • Sequencing : For investigative leads, sequencing of the virus (e.g., HIV pol gene for drug resistance, Influenza HA gene) could theoretically link strains, though the evidential weight requires careful statistical evaluation.²⁹ 4. Results & Discussion 4.1. Presentation of the Integrated Forensic Response Pathway The synthesis of the above protocols results in a structured decision pathway (Fig. 1 ). This flowchart guides the responding team from initial call screening through to evidence submission, incorporating continuous risk assessment. 4.2. Discussion of Key Forensic Challenges 4.2.1. The Probative Value of Pathogen Detection : Finding HIV RNA in a bloodstain or Influenza RNA on a surface confirms the presence of the pathogen but not the source. To forensically link it to a specific individual, one would ideally match the viral genome sequence from the evidence to that from a reference sample from the suspect.³⁰ For HIV, this is more plausible due to its slower evolution and unique integration sites in a host. For Influenza, the high mutation rate and short infection duration make a definitive match less likely unless a unique, non-circulating strain is involved.³¹ The evidence is therefore often more indicative of activity (e.g., this person bled here) than definitive identification. 4.2.2. Impact of Antiviral Treatment : As noted, an individual with undetectable HIV due to ART may still shed proviral DNA in blood. Forensically, this means a stain could test positive for HIV genetic material even if the source individual poses a negligible transmission risk.³² Conversely, the absence of detectable virus in a stain does not prove the source was uninfected. This complexity must be clearly explained in court to prevent misinterpretation. 4.2.3. The Decontamination-Preservation Paradox : Standard crime scene cleaning with bleach destroys nucleic acids. Our proposed "collect first, decontaminate after" approach, coupled with the dual-stream strategy, is the optimal compromise. The area from which evidence was collected can be decontaminated after documentation and collection are complete.³³ 4.3. Case Scenario Analysis Scenario A (Sexual Assault with HIV-Positive Suspect) The core evidence is the victim's kit. The investigation may seek the suspect's medical records to establish HIV status and treatment history. While testing the victim for exposure is a medical priority, using the suspect's HIV strain as forensic evidence would be unprecedented and ethically fraught, relying instead on traditional DNA profiling from biological material. Scenario B (Homicide with Bloodborne Pathogen Risk) Large quantities of the victim's blood (of unknown infection status) are present. CSIs operate at Tier 3+. The focus is on recovering the suspect's DNA (from a dropped cigarette, a touched surface away from the main blood pool) using Stream A collection. Stream B collection of blood stains might be used later if a suspect is identified and a question arises about the victim's potential infection status impacting the suspect's intent or actions. Scenario C (Assault involving a Sneezing/Coughing Individual) If the suspect allegedly used a biological agent (e.g., spitting while known to be ill), Stream B swabs of surfaces or air filters could be analyzed for Influenza RNA. A positive result would support the victim's account, though linking it definitively to the suspect would be challenging without a reference sample from the suspect taken at the time. 5. Legal, Ethical, and Privacy Framework This area is perhaps the most contentious. Key principles include: • Mandatory Testing : Forcing a suspect to undergo testing for HIV or other diseases raises serious legal and ethical questions regarding bodily integrity, self-incrimination, and privacy.³⁴ Most jurisdictions require a specific court order based on a compelling state interest, often balancing the rights of victims (e.g., in sexual assault cases to know their exposure risk for PEP).³⁵ • Confidentiality of Health Information : A suspect's or victim's infection status is protected health information. Its disclosure in court must be relevant to the case (e.g., proving intent in a "biological weapon" assault) and subject to strict protective orders to prevent stigma.³⁶ • Duty of Care : Police and forensic services have a duty to provide a safe working environment, which includes training, PPE, and access to PEP, justifying the implementation of the protocols described herein.³⁷ 6. Conclusion and Future Directions The forensic investigation of crimes involving individuals infected with pathogens like HIV and Influenza demands a paradigm shift from merely universal precautions to pathogen-informed, intelligence-led procedures. By integrating virological knowledge-such as transmission routes, environmental stability, and the impact of treatment-into every step of the investigative chain, we can better protect personnel, preserve critical evidence, and produce more robust scientific findings for the courts. This study recommends the following: 1. Development of National SOPs : Forensic agencies should adopt formal, written protocols based on the tiered risk assessment and dual-stream collection model. 2. Specialized Training : Continuous professional development for CSIs and lab personnel must include modules on bloodborne and airborne pathogens, biosafety, and the legal aspects of disease in investigations. 3. Inter-agency Collaboration : Close collaboration between forensic units, public health departments, and hospital infectious disease teams is crucial for risk assessment, PEP access, and expert consultation. 4. Research Priorities : Future research should focus on: validating the recovery of viral nucleic acids from forensic substrates using the dual-stream method; developing standardized statistical frameworks for interpreting viral sequence matches; and further exploring the ethical guidelines for pathogen testing in criminal investigations. Adopting this integrated, multidisciplinary strategy will enhance the safety, efficacy, and justice of forensic practice in an increasingly complex world. Abbreviations HIV: Human Immunodeficiency Virus; ART: Antiretroviral Therapy; CSI: Crime Scene Investigator; PPE: Personal Protective Equipment; PEP: Post-Exposure Prophylaxis; SOP: Standard Operating Procedure; BSL: Biosafety Level Declarations Ethics approval and consent to participate: Not applicable Consent for publication: Not applicable. This is original work/idea and has not been published anywhere till now (12-01-2026) Funding: The authors did not receive support from any organization for the submitted work. Supplementary Information : The material will be provided on request. Competing Interests Yes, authors Lakshya and Vaishali have competing interests as defined by Springer. Specifically, Author A serves as an Assistant Professor for SAM Global University, and Author B is an employee of the same. Author Contribution A. and B. wrote the main manuscript text and prepared the figure. All authors reviewed the manuscript. Acknowledgement Family and Friends, and Colleagues Data Availability Some help from AI, Major work by Author A. and B. References Saferstein R, Criminalistics (2018) An Introduction to Forensic Science, 12th edn. Pearson, New York Gall JA, Payne-James JJ (2011) Current Practice in Forensic Medicine. Wiley, Hoboken Occupational Safety and Health Administration (OSHA) (1991) Occupational exposure to bloodborne pathogens; final rule (29 CFR Part 1910.1030). Fed Regist 56(235):64004–64182 World Health Organization. HIV and AIDS: key facts (2023) Jul 13. Available from: https://www.who.int/news-room/fact-sheets/detail/hiv-aids [cited 2025 Jan 15] Paules C, Subbarao K, Influenza (2017) Lancet 390(10095):697–708 Budowle B, Schutzer SE, Breeze RG et al (2003) Public Health. Building microbial forensics as a response to bioterrorism. Science 301(5641):1852–1853 Barré-Sinoussi F, Chermann JC, Rey F et al (1983) Isolation of a T-lymphotropic retrovirus from a patient at risk for acquired immune deficiency syndrome (AIDS). Science 220(4599):868–871 Centers for Disease Control and Prevention (CDC), How HIV (2022) Spreads. Jun 2. Available from: https://www.cdc.gov/hiv/basics/transmission.html [cited 2025 Jan 15] van Bueren J, Simpson RA, Jacobs P et al (1994) Survival of human immunodeficiency virus in suspension and dried onto surfaces. J Clin Microbiol 32(2):571–574 Bond WW, Favero MS, Petersen NJ et al (1983) Inactivation of hepatitis B virus by intermediate-to-high-level disinfectant chemicals. J Clin Microbiol 18(3):535–538 Eisinger RW, Dieffenbach CW, Fauci AS (2019) HIV Viral Load and Transmissibility of HIV Infection: Undetectable Equals Untransmittable. JAMA 321(5):451–452 Eriksson EM, Liegler T, Keh CE et al (2013) New sensitive method for the detection of HIV-1 in blood. J Clin Microbiol 51(11):3814–3816 Bouvier NM, Palese P (2008) The biology of influenza viruses. Vaccine 26(Suppl 4):D49–D53 Tellier R (2009) Aerosol transmission of influenza A virus: a review of new studies. J R Soc Interface 6(Suppl 6):S783–S790 Kutter JS, Spronken MI, Fraaij PL et al (2018) Transmission routes of respiratory viruses among humans. Curr Opin Virol 28:142–151 Bean B, Moore BM, Sterner B et al (1982) Survival of influenza viruses on environmental surfaces. J Infect Dis 146(1):47–51 Krammer F, Smith GJD, Fouchier RAM et al (2018) Influenza Nat Rev Dis Primers 4(1):3 Ghedin E, Sengamalay NA, Shumway M et al (2005) Large-scale sequencing of human influenza reveals the dynamic nature of viral genome evolution. Nature 437(7062):1162–1166 National Institute of Justice (NIJ) (2013) Crime Scene Investigation: A Guide for Law Enforcement. NIJ, Washington, DC Sweet D, Lorente M, Valenzuela A et al (1997) PCR-based DNA typing of saliva stains recovered from human skin. J Forensic Sci 42(3):447–451 Leland DS, Ginocchio CC (2007) Role of cell culture for virus detection in the age of technology. Clin Microbiol Rev 20(1):49–78 Espy MJ, Uhl JR, Sloan LM et al (2006) Real-time PCR in clinical microbiology: applications for routine laboratory testing. Clin Microbiol Rev 19(1):165–256 Federal Bureau of Investigation (FBI) (2020) Quality Assurance Standards for Forensic DNA Testing Laboratories. FBI, Washington, DC Centers for Disease Control and Prevention (CDC) (2020) Biosafety in Microbiological and Biomedical Laboratories (BMBL), 6th edn. CDC, Washington, DC Chartrand C, Leeflang MM, Minion J et al (2012) Accuracy of rapid influenza diagnostic tests: a meta-analysis. Ann Intern Med 156(7):500–511 Mackay IM, Arden KE, Nitsche A (2002) Real-time PCR in virology. Nucleic Acids Res 30(6):1292–1305 Scaduto DI, Brown JM, Haaland WC et al (2013) Source identification of two HIV-1 cases by ultra-deep sequencing. Forensic Sci Int Genet 7(2):239–246 Metzker ML, Mindell DP, Liu XM et al (2002) Molecular evidence of HIV-1 transmission in a criminal case. Proc Natl Acad Sci U S A 99(22):14292–14297 Holmes EC, Ghedin E, Miller N et al (2005) Whole-genome analysis of human influenza A virus reveals multiple persistent lineages and reassortment among recent H3N2 viruses. PLoS Biol 3(9):e300 Avettand-Fenoel V, Hocqueloux L, Ghosn J et al (2016) Total HIV-1 DNA, a marker of viral reservoir dynamics with clinical implications. Clin Microbiol Rev 29(4):859–880 Fichet G, Conroy E, Duval C et al Novel methods for disinfection of prion-contaminated medical devices. Lancet 2004 Aug 7–13;364(9433):521–526 Gostin LO (2016) Public health law: power, duty, restraint, 3rd edn. University of California Press, Oakland Burris S, Beletsky L, Burleson JA et al (2007) Do criminal laws influence HIV risk behavior? An empirical trial. Ariz State Law J 39:467 Wolf LE, Vezina R (2007) Privacy and confidentiality in prison health care. In: Greifinger RB (ed) Public Health Behind Bars. Springer, New York, pp 84–100 Cieslak TJ, Kortepeter MG, Wojtyk RJ et al (2008) Beyond SARS and smallpox: the future of infection control in the forensic setting. J Law Med Ethics. Fall;36(3):582-7 Iuliano AD, Roguski KM, Chang HH et al (2018) Estimates of global seasonal influenza-associated respiratory mortality: a modelling study. Lancet 391(10127):1285–1300 Pardi N, Hogan MJ, Porter FW et al (2018) mRNA vaccines - a new era in vaccinology. Nat Rev Drug Discov 17(4):261–279 Alame MM, Massaad E, Zaraket H (2020) An overview of the advancements in influenza virus vaccines: From conventional to next generation technologies. Vaccines (Basel) 8(3):504 World Health Organization (2021) Global Influenza Strategy 2019–2030. WHO, Geneva Harper SA, Bradley JS, Englund JA et al (2009) Seasonal influenza in adults and children: diagnosis, treatment, chemoprophylaxis and institutional outbreak management: clinical practice guidelines of the Infectious Diseases Society of America. Clin Infect Dis 48(8):1003–1032 Guan Y, Poon LL, Cheung CY et al (2004) H5N1 influenza: a protean pandemic threat. Proc Natl Acad Sci U S A 101(21):8156–8161 Garten RJ, Davis CT, Russell CA et al (2009) Antigenic and genetic characteristics of swine-origin 2009 A(H1N1) influenza viruses circulating in humans. Science 325(5937):197–201 Kiseleva I, Krutikov M, Isakova-Sivak I (2022) Next-generation live attenuated influenza vaccines: Progress and challenges. Viruses 14(4):785 Cohen MS, Chen YQ, McCauley M et al (2011) Prevention of HIV-1 infection with early antiretroviral therapy. N Engl J Med 365(6):493–505 Pilcher CD, Tien HC, Eron JJ Jr et al (2004) Brief but efficient: acute HIV infection and the sexual transmission of HIV. J Infect Dis 189(10):1785–1792 Little SJ, McLean AR, Spina CA et al (1999) Viral dynamics of acute HIV-1 infection. J Exp Med 190(6):841–850 Smith DM, Wong JK, Hightower GK et al (2005) HIV drug resistance acquired through superinfection. AIDS 19(12):1251–1256 Richman DD, Margolis DM, Delaney M et al (2009) The challenge of finding a cure for HIV infection. Science 323(5919):1304–1307 Butler JM (2011) Advanced topics in forensic DNA typing: methodology. Academic, San Diego Gill P (2001) An assessment of the utility of single nucleotide polymorphisms (SNPs) for forensic purposes. Int J Legal Med 114(4–5):204–210 Jobling MA, Gill P (2004) Encoded evidence: DNA in forensic analysis. Nat Rev Genet 5(10):739–751 Prinz M, Carracedo A, Mayr WR et al (2007) DNA Commission of the International Society for Forensic Genetics (ISFG): recommendations regarding the role of forensic genetics for disaster victim identification (DVI). Forensic Sci Int Genet 1(1):3–12 Linacre A, Gusmão L, Hecht W et al (2011) ISFG: recommendations regarding the use of non-human (animal) DNA in forensic genetic investigations. Forensic Sci Int Genet 5(5):501–505 Bieber FR, Buckleton JS, Budowle B et al (2016) Evaluation of forensic DNA mixture evidence: protocol for evaluation, interpretation, and statistical calculations using the combined probability of inclusion. BMC Genet 17:125 Wein LM, Craft DL, Kaplan EH (2003) Emergency response to an anthrax attack. Proc Natl Acad Sci U S A 100(7):4346–4351 Morse SA, Budowle B (2006) Microbial forensics: application to bioterrorism preparedness and response. Infect Dis Clin North Am 20(2):455–473 Keim P, Van Ert MN, Pearson T et al (2004) Anthrax molecular epidemiology and forensics: using the appropriate marker for different evolutionary scales. Infect Genet Evol 4(3):205–213 Klietmann WF, Ruoff KL (2001) Bioterrorism: implications for the clinical microbiologist. Clin Microbiol Rev 14(2):364–381 Additional Declarations Competing interest reported. Yes, authors Lakshya (A) and Vaishali (B) have competing interests as defined by Springer. Specifically, Author A serves as an Assistant Professor for SAM Global University, and Author B is an employee of the same. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8569968","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Systematic Review","associatedPublications":[],"authors":[{"id":573344822,"identity":"2c9584a2-9ac4-4588-90d1-523c666e29a6","order_by":0,"name":"Lakshya Bhardwaj","email":"data:image/png;base64,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","orcid":"","institution":"Assistant Professor at SAM Global University, Raisen","correspondingAuthor":true,"prefix":"","firstName":"Lakshya","middleName":"","lastName":"Bhardwaj","suffix":""},{"id":573344823,"identity":"8db156ab-a32c-4384-842b-3b0aae728e82","order_by":1,"name":"Vaishali Vardiya","email":"","orcid":"","institution":"Assistant Professor at SAM Global University, Raisen","correspondingAuthor":false,"prefix":"","firstName":"Vaishali","middleName":"","lastName":"Vardiya","suffix":""}],"badges":[],"createdAt":"2026-01-10 18:08:37","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":false,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false},"doi":"10.21203/rs.3.rs-8569968/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8569968/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":100400796,"identity":"f1fca293-bd61-4c7a-aa3e-a0c147a0b5f4","added_by":"auto","created_at":"2026-01-16 11:58:26","extension":"png","order_by":1,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":1485524,"visible":true,"origin":"","legend":"","description":"","filename":"F1.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/424aa5a5a5bb568d170c08b4.png"},{"id":100400705,"identity":"62735d1d-f250-43d6-b902-c961f5894591","added_by":"auto","created_at":"2026-01-16 11:58:23","extension":"json","order_by":2,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":4691,"visible":true,"origin":"","legend":"","description":"","filename":"aff636781b4844d5a3a5d85986424e8c.json","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/81f986ac29fd770e37edf393.json"},{"id":100401454,"identity":"ecc0c619-2fba-4636-bab3-28f5f46e63aa","added_by":"auto","created_at":"2026-01-16 11:58:55","extension":"xml","order_by":3,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":97491,"visible":true,"origin":"","legend":"","description":"","filename":"aff636781b4844d5a3a5d85986424e8c1enriched.xml","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/28fb93c1d298e933783530fa.xml"},{"id":100400412,"identity":"b3ac0b35-c819-407c-b89d-427b3520b09c","added_by":"auto","created_at":"2026-01-16 11:58:08","extension":"png","order_by":4,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":1485524,"visible":true,"origin":"","legend":"","description":"","filename":"F1.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/63a5e213c5343c761aadd218.png"},{"id":100401438,"identity":"539dabcc-9866-455d-9199-4fe8993f8af0","added_by":"auto","created_at":"2026-01-16 11:58:54","extension":"png","order_by":5,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":176972,"visible":true,"origin":"","legend":"","description":"","filename":"floatimage1.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/c6862d93aeaeb1113b20de27.png"},{"id":100400391,"identity":"47f234fb-a130-4be0-b7f9-67d9d66d474e","added_by":"auto","created_at":"2026-01-16 11:58:07","extension":"png","order_by":6,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":262456,"visible":true,"origin":"","legend":"","description":"","filename":"OnlineF1.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/b8db586a7586beea42aef2a6.png"},{"id":100400063,"identity":"d56835f2-b9ba-48b0-9af5-3802b4cef025","added_by":"auto","created_at":"2026-01-16 11:57:51","extension":"png","order_by":7,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":42093,"visible":true,"origin":"","legend":"","description":"","filename":"Onlinefloatimage1.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/47e4e2906c4853f83f10e5cb.png"},{"id":100401678,"identity":"81968811-2569-4307-a5a5-6504d8054e7d","added_by":"auto","created_at":"2026-01-16 11:59:09","extension":"xml","order_by":8,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":88753,"visible":true,"origin":"","legend":"","description":"","filename":"aff636781b4844d5a3a5d85986424e8c1structuring.xml","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/4d42c2ba46d6a564e8dcda82.xml"},{"id":100400416,"identity":"bd5edc22-a72c-4161-a94a-c834be5e2df9","added_by":"auto","created_at":"2026-01-16 11:58:08","extension":"html","order_by":9,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":109870,"visible":true,"origin":"","legend":"","description":"","filename":"earlyproof.html","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/84fbce137be14a32fbff0217.html"},{"id":100400909,"identity":"3e954946-236c-44fe-80b2-26bdd4869e0d","added_by":"auto","created_at":"2026-01-16 11:58:30","extension":"png","order_by":1,"title":"Figure 1","display":"","copyAsset":false,"role":"figure","size":156312,"visible":true,"origin":"","legend":"\u003cp\u003eIntegrated Forensic Response Pathway at a Crime Scene with Suspected Biological Pathogen Hazard.\u003c/p\u003e\n\u003cp\u003eThis flowchart outlines the integrated, intelligence-led decision pathway for responding to crime scenes with potential biological pathogen hazards. The process begins with initial call screening and triggers a continuous risk assessment. Based on specific indicators (visible fluids, pathogen type), a tiered Personal Protective Equipment (PPE) protocol is enacted, escalating from baseline (Tier 1) to pathogen-specific (Tiers 3 \u0026amp; 3+) precautions. The evidence collection phase employs a dual-stream strategy: Stream A prioritises preserving human DNA for traditional forensic analysis, while Stream B is activated when pathogen detection is forensically relevant, utilizing specialized collection media and packaging. The pathway ensures scene safety and evidence integrity, culminating in secure laboratory submission for analysis under appropriate biosafety containment.\u003c/p\u003e","description":"","filename":"image1.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/287e29c0d98b772321ef3292.png"},{"id":100401624,"identity":"25436cd2-6bdc-46c2-b2ee-9a617c87bac5","added_by":"auto","created_at":"2026-01-16 11:59:07","extension":"png","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":56809,"visible":true,"origin":"","legend":"\u003cp\u003eComparison of Standard versus Biohazard Evidence Processing Streams.\u003c/p\u003e\n\u003cp\u003eSchematic comparison of standard forensic evidence processing versus the proposed dual-stream biohazard evidence processing workflow, highlighting the key decision points for preserving human DNA versus pathogen nucleic acids.\u003c/p\u003e","description":"","filename":"image2.png","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/1bdf50651763a1ff46191793.png"},{"id":104808564,"identity":"a4859201-9785-46c9-a785-3dcec3d2a0d6","added_by":"auto","created_at":"2026-03-17 12:38:44","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1373471,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8569968/v1/5c5d0745-d817-46df-9d15-b855c464b209.pdf"}],"financialInterests":"Competing interest reported. Yes, authors Lakshya (A) and Vaishali (B) have competing interests as defined by Springer. Specifically, Author A serves as an Assistant Professor for SAM Global University, and Author B is an employee of the same.","formattedTitle":"Forensic Investigation of Crimes Involving Diseased, HIV-Infected, and Influenza-Infected Individuals: Protocols, Challenges, and Integrated Strategies","fulltext":[{"header":"1. Introduction","content":"\u003cp\u003eThe primary mandate of forensic science is the unbiased analysis of physical evidence to reconstruct events and establish links within the judicial system. This task becomes exponentially complex when the evidence itself, or the individuals involved, poses a biological infection risk.\u0026sup1; Crimes such as sexual assaults, homicides with significant bloodletting, assaults with weapons, and instances of bioterrorism or malicious transmission can involve perpetrators or victims infected with communicable diseases.\u0026sup2; Among these, HIV and Influenza represent two potent yet virologically distinct models: one a chronic bloodborne virus with profound social stigma and legal implications, and the other a ubiquitous, rapidly evolving respiratory virus with pandemic potential.\u0026sup3;,⁴\u003c/p\u003e \u003cp\u003eCurrent standard forensic protocols, while addressing universal precautions for bloodborne pathogens, often lack the granularity required for pathogen-specific threats.⁵ The virological intricacies of these viruses-HIV's transmission through specific bodily fluids and Influenza's modes of spread via droplets, aerosols, and fomites-are well-documented.⁶,⁷ However, the translation of this virological knowledge into actionable forensic practice is not well-documented. Investigators face a triad of critical challenges: (\u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e1\u003c/span\u003e) mitigating occupational infection risk, (\u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2\u003c/span\u003e) collecting and preserving evidence that may be contaminated with viable pathogens without compromising its analytical value, and (\u003cspan citationid=\"CR3\" class=\"CitationRef\"\u003e3\u003c/span\u003e) interpreting the forensic significance of detecting a pathogen at a crime scene.⁸\u003c/p\u003e \u003cp\u003eThis paper therefore seeks to bridge this gap. By integrating detailed virological profiles of HIV and Influenza with established forensic science principles, we aim to construct a structured, pathogen-aware framework for crime scene investigation. This review will delineate specific protocols, discuss interpretative and legal challenges, and propose integrated strategies to safeguard both the health of forensic personnel and the integrity of the justice process.\u003c/p\u003e"},{"header":"2. Review of Pathogens: Forensic Relevance of HIV and Influenza","content":"\u003cdiv id=\"Sec3\" class=\"Section2\"\u003e \u003ch2\u003e2.1. Human Immunodeficiency Virus (HIV): A Persistent Bloodborne Challenge\u003c/h2\u003e \u003cp\u003eHIV is a lentivirus that attacks the host's immune system, specifically CD4\u0026thinsp;+\u0026thinsp;T-lymphocytes.⁹ Its forensic relevance stems from its primary transmission routes: direct contact with infected blood, semen, vaginal fluids, and breast milk.\u0026sup1;⁰ From a crime scene perspective, dried blood represents the most stable and common source. Studies indicate that HIV can remain viable in dried blood at room temperature for several days, though infectivity decreases over time.\u0026sup1;\u0026sup1; The virus is enveloped, making it susceptible to common disinfectants like sodium hypochlorite (bleach), ethanol, and hydrogen peroxide.\u0026sup1;\u0026sup2;\u003c/p\u003e \u003cp\u003eA critical forensic consideration is the impact of Antiretroviral Therapy (ART). A suspect or victim on effective ART may have an \"undetectable\" viral load in plasma, drastically reducing transmission risk via sexual contact (the U\u0026thinsp;=\u0026thinsp;U principle).\u0026sup1;\u0026sup3; However, this does not imply the absence of viral genetic material in evidentiary stains. Proviral DNA integrated into host cells within a blood or tissue stain may still be detectable via sensitive PCR assays, offering a potential forensic marker independent of circulating viral load.\u0026sup1;⁴\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec4\" class=\"Section2\"\u003e \u003ch2\u003e2.2. Influenza Virus: A Volatile Respiratory Hazard\u003c/h2\u003e \u003cp\u003eInfluenza viruses are segmented, negative-sense RNA viruses of the Orthomyxoviridae family, with types A and B being most clinically significant.\u0026sup1;⁵ Their forensic relevance is tied to their efficient transmission via respiratory droplets (\u0026gt;\u0026thinsp;5 \u0026micro;m) produced by coughing or sneezing, which can contaminate surfaces (fomites), and via smaller aerosol particles (\u0026lt;\u0026thinsp;5 \u0026micro;m) in poorly ventilated spaces.\u0026sup1;⁶,\u0026sup1;⁷ The stability of Influenza on surfaces is variable, lasting from 2 to 8 hours on non-porous materials like steel and plastic, but less on porous surfaces.\u0026sup1;⁸ It is susceptible to disinfectants, heat, and ultraviolet light.\u003c/p\u003e \u003cp\u003eThe high mutation rate of Influenza, through antigenic drift and shift, presents a unique, albeit theoretically complex, forensic possibility.\u0026sup1;⁹ In a closed-scenario investigation (e.g., a kidnapping in a vehicle), could the viral strain recovered from a tissue or air filter be genetically matched to the strain infecting a suspect? While technologically feasible using next-generation sequencing, the ubiquity and rapid evolution of influenza strains would make such evidence highly circumstantial unless a rare or unique strain was involved.\u0026sup2;⁰\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab1\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 1\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eForensically Relevant Characteristics of HIV and Influenza Viruses\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"3\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCharacteristic\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eHuman Immunodeficiency Virus (HIV)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eInfluenza Virus (Types A/B)\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003ePrimary Route of Forensic Relevance\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eExposure to infectious blood, semen, vaginal fluid, or breast milk via mucosal surfaces, percutaneous injury, or contaminated sharps.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eInhalation of virus-laden respiratory droplets or aerosols, or self-inoculation via fomite contact (hand-to-face transfer).\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003ePersistence in the Environment\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eDemonstrates viability in dried blood residues at ambient temperatures for several days; survival extends in protected, hydrated matrices like within syringes.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eRetains infectious potential on non-porous surfaces (e.g., metal, plastic) for up to 48 hours; stability in air is limited to hours and is highly dependent on humidity.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003eVulnerability to Decontamination\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003ePossesses a lipid envelope, rendering it highly susceptible to inactivation by oxidizing agents (e.g., bleach, peroxides) and high-concentration alcohols (\u0026gt;\u0026thinsp;70%).\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eSimilarly enveloped; readily inactivated by common hospital-grade disinfectants, including alcohols, chlorine-based agents, and quaternary ammonium compounds.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003eMolecular Detectability Window in Evidence\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eIntegrated proviral DNA, protected within host cell debris, can be amplified via PCR from dried biological stains for years. Cell-free viral RNA is less stable but may persist for weeks.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eViral RNA may be detected by RT-PCR on environmental swabs for several days after contamination, but this often outlasts the period of actual infectivity. Recovery is highly matrix-dependent.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003ePrincipal Investigative Implications\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1. Presents a persistent, high-consequence bloodborne hazard.\u003c/p\u003e \u003cp\u003e2. Social and legal stigma may influence case dynamics.\u003c/p\u003e \u003cp\u003e3. Antiretroviral therapy can decouple detectable viral load from the presence of proviral DNA in a stain, complicating forensic interpretation of transmissibility.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1. Presents an acute, airborne hazard requiring respiratory protection.\u003c/p\u003e \u003cp\u003e2. Rapid environmental decay necessitates swift evidence collection.\u003c/p\u003e \u003cp\u003e3. Ubiquitous nature and constant genetic evolution severely limit the probative value of strain identification for source attribution.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e"},{"header":"3. Materials and Methods (Proposed Forensic Protocols)","content":"\u003cp\u003eThis section outlines a proposed framework derived from a synthesis of virological data and forensic best practices. The methodology is descriptive and prescriptive, designed for implementation by forensic units.\u003c/p\u003e \u003cdiv id=\"Sec6\" class=\"Section2\"\u003e \u003ch2\u003e3.1. Initial Risk Assessment and Scene Management\u003c/h2\u003e \u003cp\u003eThe first responder's initial report should trigger a risk assessment. Indicators include: the nature of the crime (assault, needle-stick injury, sexual offense), visible presence of blood/body fluids, reports of the suspect/victim being ill or diagnosed with an infection, or the setting (e.g., a drug use site, medical facility).\u0026sup2;\u0026sup1; Based on this, a tiered PPE protocol should be enacted (See Table\u0026nbsp;\u003cspan refid=\"Tab2\" class=\"InternalRef\"\u003e2\u003c/span\u003e).\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab2\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 2\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eTiered Biosafety Protocol for Crime Scene Investigation\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"4\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eRisk Tier \u0026amp; Designation\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eTriggering Scenario Indicators\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eMandatory Minimum Personal Protective Equipment (PPE)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003eCritical Additional Operational Measures\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003eTier 1: Baseline Precautions\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eAbsence of visible biological material. No intelligence or contextual indicators suggesting an infection risk.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eSingle-use nitrile gloves. Disposable shoe covers.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003eAdherence to core hygiene practices (e.g., no touching face, hand sanitization upon glove removal).\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003eTier 2: Fluid-Resistant Barriers\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003ePresence of visible blood or other bodily fluids. Common in assaults, homicides, or accidents without a known transmissible disease context.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eNitrile gloves, impermeable gown or coveralls, full-face shield or safety goggles, surgical/procedure mask, and shoe covers.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003eImplementation of a sharps management protocol. Restriction of non-essential personnel within the contaminated zone. Use of biohazard-labeled collection containers.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003eTier 3: Respiratory/Aerosol Protection\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eSituations involving a suspected or confirmed respiratory pathogen (e.g., Influenza, COVID-19). Scenes in poorly ventilated, confined spaces where an infected individual was present.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eAll Tier 2 PPE, with the surgical mask replaced by a\u0026nbsp;\u003cb\u003efit-tested N95 respirator\u003c/b\u003e\u0026nbsp;(or FFP2/FFP3, PAPR equivalent).\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003eActive ventilation of the space before and during processing, if feasible. Consideration of air sampling for pathogen detection in relevant cases. Decontamination of the respirator upon exit.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003eTier 3+: Specific High-Risk Pathogen Protocol\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eKnown involvement of an individual with a high-consequence bloodborne infection (e.g., HIV, HBV, HCV). Incidents with a high probability of percutaneous exposure (e.g., needle-stick assault).\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003eAll Tier 2 PPE. An N95 respirator is added if a concurrent respiratory risk exists (e.g., the individual also has a cough). No reduction in fluid protection.\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003eImmediate availability of a\u0026nbsp;\u003cb\u003ePost-Exposure Prophylaxis (PEP) kit\u003c/b\u003e\u0026nbsp;and established emergency medical referral pathways. Extreme, deliberate caution during the search for and handling of sharps. Double-gloving may be considered.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e\u003cbr\u003e\u003ctfoot\u003e \u003ctr\u003e\u003ctd colspan=\"4\"\u003e\u003cb\u003eOperational Rationale\u003c/b\u003e:\u003c/td\u003e\u003c/tr\u003e \u003c/tfoot\u003e \u003cp\u003eThis tiered framework is designed to be risk-proportionate and intelligence-led. Escalation is triggered by specific visual or intelligence-based indicators, moving from universal precautions (Tier 1) to pathogen-specific containment (Tier 3+). The protocol emphasizes that respiratory protection (Tier 3) is distinct from, and can be concurrent with, bloodborne pathogen protocols (Tier 3+). The \"Additional Measures\" column integrates critical risk mitigation steps that extend beyond PPE, forming a complete safety workflow.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec7\" class=\"Section2\"\u003e \u003ch2\u003e3.2. Evidence Collection and Preservation: A Dual-Stream Approach\u003c/h2\u003e \u003cp\u003eA central conflict exists between the need to inactivate pathogens for safety and the need to preserve nucleic acids (human and viral) for analysis. The solution is a dual-stream collection strategy:\u003c/p\u003e \u003cp\u003e1. \u003cb\u003eStream A (For Human DNA \u0026amp; Traditional Forensics)\u003c/b\u003e: Collected first. Items are handled with care to avoid contamination. Swabs from stains are taken using sterile, slightly moistened (with distilled water) swabs and air-dried before packaging in paper. This minimizes pathogen viability over time while preserving human DNA.\u0026sup2;\u0026sup2;\u003c/p\u003e \u003cp\u003e2. \u003cb\u003eStream B (For Pathogen Detection/Survival)\u003c/b\u003e: Collected if there is a specific investigative question about the pathogen (e.g., \"Was the HIV strain in the blood a match to the suspect's?\"). This requires specific tools:\u003c/p\u003e \u003cp\u003eo \u003cb\u003eViral Transport Media (VTM)\u003c/b\u003e: For swabs intended for viral culture or sensitive RNA detection (e.g., for Influenza), a swab in VTM is essential and must be kept cold.\u0026sup2;\u0026sup3;\u003c/p\u003e \u003cp\u003eo \u003cb\u003eDirect Lysis Buffers\u003c/b\u003e: For PCR-based detection, swabs can be placed in buffers that lyse the virus and stabilize RNA/DNA, rendering the sample non-infectious for downstream lab work.\u0026sup2;⁴\u003c/p\u003e \u003cp\u003eo \u003cb\u003ePackaging\u003c/b\u003e: All biohazardous evidence must be double-bagged, with the primary container being leak-proof and puncture-resistant (e.g., a plastic vial inside a zip-lock bag, placed in a paper bag labeled \"BIOHAZARD\").\u0026sup2;⁵\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec8\" class=\"Section2\"\u003e \u003ch2\u003e3.3. Laboratory Analysis Considerations\u003c/h2\u003e \u003cp\u003eForensic biology labs must have protocols for receiving and analyzing biohazardous evidence, ideally within Biosafety Level 2 (BSL-2) facilities.\u0026sup2;⁶ Workflow should spatially or temporally separate the initial processing of potentially infectious items. Analysis can include:\u003c/p\u003e \u003cp\u003e\u0026bull; \u003cb\u003eImmunoassays\u003c/b\u003e: Rapid antigen tests have limited forensic use due to lower sensitivity, but could provide rapid screening information in exigent circumstances.\u0026sup2;⁷\u003c/p\u003e \u003cp\u003e\u0026bull; \u003cb\u003eMolecular Detection (RT-PCR/qPCR)\u003c/b\u003e: The gold standard for detecting viral genetic material (HIV RNA/proviral DNA, Influenza RNA) from evidence swabs.\u0026sup2;⁸\u003c/p\u003e \u003cp\u003e\u0026bull; \u003cb\u003eSequencing\u003c/b\u003e: For investigative leads, sequencing of the virus (e.g., HIV \u003cem\u003epol\u003c/em\u003e gene for drug resistance, Influenza HA gene) could theoretically link strains, though the evidential weight requires careful statistical evaluation.\u0026sup2;⁹\u003c/p\u003e \u003c/div\u003e"},{"header":"4. Results \u0026 Discussion","content":"\u003cdiv id=\"Sec10\" class=\"Section2\"\u003e\n \u003ch2\u003e4.1. Presentation of the Integrated Forensic Response Pathway\u003c/h2\u003e\n \u003cp\u003eThe synthesis of the above protocols results in a structured decision pathway (Fig. \u003cspan class=\"InternalRef\"\u003e1\u003c/span\u003e). This flowchart guides the responding team from initial call screening through to evidence submission, incorporating continuous risk assessment.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec11\" class=\"Section2\"\u003e\n \u003ch2\u003e4.2. Discussion of Key Forensic Challenges\u003c/h2\u003e\u003cspan\u003e\n \u003cp\u003e\u003cstrong\u003e4.2.1. The Probative Value of Pathogen Detection\u003c/strong\u003e: Finding HIV RNA in a bloodstain or Influenza RNA on a surface confirms the presence of the pathogen but not the source. To forensically link it to a specific individual, one would ideally match the viral genome sequence from the evidence to that from a reference sample from the suspect.\u0026sup3;⁰ For HIV, this is more plausible due to its slower evolution and unique integration sites in a host. For Influenza, the high mutation rate and short infection duration make a definitive match less likely unless a unique, non-circulating strain is involved.\u0026sup3;\u0026sup1; The evidence is therefore often more indicative of activity (e.g., this person bled here) than definitive identification.\u003c/p\u003e\n \u003c/span\u003e \u003cspan\u003e\n \u003cp\u003e\u003cstrong\u003e4.2.2. Impact of Antiviral Treatment\u003c/strong\u003e: As noted, an individual with undetectable HIV due to ART may still shed proviral DNA in blood. Forensically, this means a stain could test positive for HIV genetic material even if the source individual poses a negligible transmission risk.\u0026sup3;\u0026sup2; Conversely, the absence of detectable virus in a stain does not prove the source was uninfected. This complexity must be clearly explained in court to prevent misinterpretation.\u003c/p\u003e\n \u003c/span\u003e \u003cspan\u003e\n \u003cp\u003e\u003cstrong\u003e4.2.3. The Decontamination-Preservation Paradox\u003c/strong\u003e: Standard crime scene cleaning with bleach destroys nucleic acids. Our proposed \u0026quot;collect first, decontaminate after\u0026quot; approach, coupled with the dual-stream strategy, is the optimal compromise. The area from which evidence was collected can be decontaminated after documentation and collection are complete.\u0026sup3;\u0026sup3;\u003c/p\u003e\n \u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv id=\"Sec12\" class=\"Section2\"\u003e\n \u003ch2\u003e4.3. Case Scenario Analysis\u003c/h2\u003e\n \u003cp\u003e\u003cstrong\u003eScenario A (Sexual Assault with HIV-Positive Suspect)\u003c/strong\u003e\u003c/p\u003e\n \u003cp\u003eThe core evidence is the victim\u0026apos;s kit. The investigation may seek the suspect\u0026apos;s medical records to establish HIV status and treatment history. While testing the victim for exposure is a medical priority, using the suspect\u0026apos;s HIV strain as forensic evidence would be unprecedented and ethically fraught, relying instead on traditional DNA profiling from biological material.\u003c/p\u003e\n \u003cp\u003e\u003cstrong\u003eScenario B (Homicide with Bloodborne Pathogen Risk)\u003c/strong\u003e\u003c/p\u003e\n \u003cp\u003eLarge quantities of the victim\u0026apos;s blood (of unknown infection status) are present. CSIs operate at Tier 3+. The focus is on recovering the suspect\u0026apos;s DNA (from a dropped cigarette, a touched surface away from the main blood pool) using Stream A collection. Stream B collection of blood stains might be used later if a suspect is identified and a question arises about the victim\u0026apos;s potential infection status impacting the suspect\u0026apos;s intent or actions.\u003c/p\u003e\n \u003cp\u003e\u003cstrong\u003eScenario C (Assault involving a Sneezing/Coughing Individual)\u003c/strong\u003e\u003c/p\u003e\n \u003cp\u003eIf the suspect allegedly used a biological agent (e.g., spitting while known to be ill), Stream B swabs of surfaces or air filters could be analyzed for Influenza RNA. A positive result would support the victim\u0026apos;s account, though linking it definitively to the suspect would be challenging without a reference sample from the suspect taken at the time.\u003c/p\u003e\n\u003c/div\u003e"},{"header":"5. Legal, Ethical, and Privacy Framework","content":"\u003cp\u003eThis area is perhaps the most contentious. Key principles include:\u003c/p\u003e \u003cp\u003e\u0026bull; \u003cb\u003eMandatory Testing\u003c/b\u003e: Forcing a suspect to undergo testing for HIV or other diseases raises serious legal and ethical questions regarding bodily integrity, self-incrimination, and privacy.\u0026sup3;⁴ Most jurisdictions require a specific court order based on a compelling state interest, often balancing the rights of victims (e.g., in sexual assault cases to know their exposure risk for PEP).\u0026sup3;⁵\u003c/p\u003e \u003cp\u003e\u0026bull; \u003cb\u003eConfidentiality of Health Information\u003c/b\u003e: A suspect's or victim's infection status is protected health information. Its disclosure in court must be relevant to the case (e.g., proving intent in a \"biological weapon\" assault) and subject to strict protective orders to prevent stigma.\u0026sup3;⁶\u003c/p\u003e \u003cp\u003e\u0026bull; \u003cb\u003eDuty of Care\u003c/b\u003e: Police and forensic services have a duty to provide a safe working environment, which includes training, PPE, and access to PEP, justifying the implementation of the protocols described herein.\u0026sup3;⁷\u003c/p\u003e"},{"header":"6. Conclusion and Future Directions","content":"\u003cp\u003eThe forensic investigation of crimes involving individuals infected with pathogens like HIV and Influenza demands a paradigm shift from merely universal precautions to pathogen-informed, intelligence-led procedures. By integrating virological knowledge-such as transmission routes, environmental stability, and the impact of treatment-into every step of the investigative chain, we can better protect personnel, preserve critical evidence, and produce more robust scientific findings for the courts.\u003c/p\u003e \u003cp\u003eThis study recommends the following:\u003c/p\u003e \u003cp\u003e1. \u003cb\u003eDevelopment of National SOPs\u003c/b\u003e: Forensic agencies should adopt formal, written protocols based on the tiered risk assessment and dual-stream collection model.\u003c/p\u003e \u003cp\u003e2. \u003cb\u003eSpecialized Training\u003c/b\u003e: Continuous professional development for CSIs and lab personnel must include modules on bloodborne and airborne pathogens, biosafety, and the legal aspects of disease in investigations.\u003c/p\u003e \u003cp\u003e3. \u003cb\u003eInter-agency Collaboration\u003c/b\u003e: Close collaboration between forensic units, public health departments, and hospital infectious disease teams is crucial for risk assessment, PEP access, and expert consultation.\u003c/p\u003e \u003cp\u003e4. \u003cb\u003eResearch Priorities\u003c/b\u003e: Future research should focus on: validating the recovery of viral nucleic acids from forensic substrates using the dual-stream method; developing standardized statistical frameworks for interpreting viral sequence matches; and further exploring the ethical guidelines for pathogen testing in criminal investigations.\u003c/p\u003e \u003cp\u003eAdopting this integrated, multidisciplinary strategy will enhance the safety, efficacy, and justice of forensic practice in an increasingly complex world.\u003c/p\u003e"},{"header":"Abbreviations","content":"\u003cp\u003eHIV: Human Immunodeficiency Virus; ART: Antiretroviral Therapy; CSI: Crime Scene Investigator; PPE: Personal Protective Equipment; PEP: Post-Exposure Prophylaxis; SOP: Standard Operating Procedure; BSL: Biosafety Level\u003c/p\u003e"},{"header":"Declarations","content":"\u003cp\u003e\u003cstrong\u003eEthics approval and consent to participate:\u003c/strong\u003e Not applicable\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eConsent for publication:\u003c/strong\u003e Not applicable. This is original work/idea and has not been published anywhere till now (12-01-2026)\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunding:\u003c/strong\u003e The authors did not receive support from any organization for the submitted work.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupplementary Information\u003c/strong\u003e: The material will be provided on request.\u003c/p\u003e\u003cp\u003e\u003cstrong\u003eCompeting Interests\u003c/strong\u003e\u003cp\u003eYes, authors Lakshya and Vaishali have competing interests as defined by Springer. Specifically, Author A serves as an Assistant Professor for SAM Global University, and Author B is an employee of the same.\u003c/p\u003e\u003c/p\u003e\u003ch2\u003eAuthor Contribution\u003c/h2\u003e\u003cp\u003eA. and B. wrote the main manuscript text and prepared the figure. All authors reviewed the manuscript.\u003c/p\u003e\u003ch2\u003eAcknowledgement\u003c/h2\u003e\u003cp\u003eFamily and Friends, and Colleagues\u003c/p\u003e\u003ch2\u003eData Availability\u003c/h2\u003e\u003cp\u003eSome help from AI, Major work by Author A. and B.\u003c/p\u003e"},{"header":"References","content":"\u003col\u003e\u003cli\u003e\u003cspan\u003eSaferstein R, Criminalistics (2018) An Introduction to Forensic Science, 12th edn. Pearson, New York\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eGall JA, Payne-James JJ (2011) Current Practice in Forensic Medicine. Wiley, Hoboken\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eOccupational Safety and Health Administration (OSHA) (1991) Occupational exposure to bloodborne pathogens; final rule (29 CFR Part 1910.1030). Fed Regist 56(235):64004\u0026ndash;64182\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eWorld Health Organization. HIV and AIDS: key facts (2023) Jul 13. Available from: \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://www.who.int/news-room/fact-sheets/detail/hiv-aids\u003c/span\u003e\u003cspan address=\"https://www.who.int/news-room/fact-sheets/detail/hiv-aids\" targettype=\"URL\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e [cited 2025 Jan 15]\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003ePaules C, Subbarao K, Influenza (2017) Lancet 390(10095):697\u0026ndash;708\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBudowle B, Schutzer SE, Breeze RG et al (2003) Public Health. Building microbial forensics as a response to bioterrorism. Science 301(5641):1852\u0026ndash;1853\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBarr\u0026eacute;-Sinoussi F, Chermann JC, Rey F et al (1983) Isolation of a T-lymphotropic retrovirus from a patient at risk for acquired immune deficiency syndrome (AIDS). Science 220(4599):868\u0026ndash;871\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eCenters for Disease Control and Prevention (CDC), How HIV (2022) Spreads. Jun 2. Available from: \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://www.cdc.gov/hiv/basics/transmission.html\u003c/span\u003e\u003cspan address=\"https://www.cdc.gov/hiv/basics/transmission.html\" targettype=\"URL\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e [cited 2025 Jan 15]\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003evan Bueren J, Simpson RA, Jacobs P et al (1994) Survival of human immunodeficiency virus in suspension and dried onto surfaces. J Clin Microbiol 32(2):571\u0026ndash;574\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBond WW, Favero MS, Petersen NJ et al (1983) Inactivation of hepatitis B virus by intermediate-to-high-level disinfectant chemicals. J Clin Microbiol 18(3):535\u0026ndash;538\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eEisinger RW, Dieffenbach CW, Fauci AS (2019) HIV Viral Load and Transmissibility of HIV Infection: Undetectable Equals Untransmittable. JAMA 321(5):451\u0026ndash;452\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eEriksson EM, Liegler T, Keh CE et al (2013) New sensitive method for the detection of HIV-1 in blood. J Clin Microbiol 51(11):3814\u0026ndash;3816\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBouvier NM, Palese P (2008) The biology of influenza viruses. Vaccine 26(Suppl 4):D49\u0026ndash;D53\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eTellier R (2009) Aerosol transmission of influenza A virus: a review of new studies. J R Soc Interface 6(Suppl 6):S783\u0026ndash;S790\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eKutter JS, Spronken MI, Fraaij PL et al (2018) Transmission routes of respiratory viruses among humans. Curr Opin Virol 28:142\u0026ndash;151\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBean B, Moore BM, Sterner B et al (1982) Survival of influenza viruses on environmental surfaces. J Infect Dis 146(1):47\u0026ndash;51\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eKrammer F, Smith GJD, Fouchier RAM et al (2018) Influenza Nat Rev Dis Primers 4(1):3\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eGhedin E, Sengamalay NA, Shumway M et al (2005) Large-scale sequencing of human influenza reveals the dynamic nature of viral genome evolution. Nature 437(7062):1162\u0026ndash;1166\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eNational Institute of Justice (NIJ) (2013) Crime Scene Investigation: A Guide for Law Enforcement. NIJ, Washington, DC\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eSweet D, Lorente M, Valenzuela A et al (1997) PCR-based DNA typing of saliva stains recovered from human skin. J Forensic Sci 42(3):447\u0026ndash;451\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eLeland DS, Ginocchio CC (2007) Role of cell culture for virus detection in the age of technology. Clin Microbiol Rev 20(1):49\u0026ndash;78\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eEspy MJ, Uhl JR, Sloan LM et al (2006) Real-time PCR in clinical microbiology: applications for routine laboratory testing. Clin Microbiol Rev 19(1):165\u0026ndash;256\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eFederal Bureau of Investigation (FBI) (2020) Quality Assurance Standards for Forensic DNA Testing Laboratories. FBI, Washington, DC\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eCenters for Disease Control and Prevention (CDC) (2020) Biosafety in Microbiological and Biomedical Laboratories (BMBL), 6th edn. CDC, Washington, DC\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eChartrand C, Leeflang MM, Minion J et al (2012) Accuracy of rapid influenza diagnostic tests: a meta-analysis. Ann Intern Med 156(7):500\u0026ndash;511\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eMackay IM, Arden KE, Nitsche A (2002) Real-time PCR in virology. Nucleic Acids Res 30(6):1292\u0026ndash;1305\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eScaduto DI, Brown JM, Haaland WC et al (2013) Source identification of two HIV-1 cases by ultra-deep sequencing. Forensic Sci Int Genet 7(2):239\u0026ndash;246\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eMetzker ML, Mindell DP, Liu XM et al (2002) Molecular evidence of HIV-1 transmission in a criminal case. Proc Natl Acad Sci U S A 99(22):14292\u0026ndash;14297\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eHolmes EC, Ghedin E, Miller N et al (2005) Whole-genome analysis of human influenza A virus reveals multiple persistent lineages and reassortment among recent H3N2 viruses. PLoS Biol 3(9):e300\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eAvettand-Fenoel V, Hocqueloux L, Ghosn J et al (2016) Total HIV-1 DNA, a marker of viral reservoir dynamics with clinical implications. Clin Microbiol Rev 29(4):859\u0026ndash;880\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eFichet G, Conroy E, Duval C et al Novel methods for disinfection of prion-contaminated medical devices. Lancet 2004 Aug 7\u0026ndash;13;364(9433):521\u0026ndash;526\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eGostin LO (2016) Public health law: power, duty, restraint, 3rd edn. University of California Press, Oakland\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBurris S, Beletsky L, Burleson JA et al (2007) Do criminal laws influence HIV risk behavior? An empirical trial. Ariz State Law J 39:467\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eWolf LE, Vezina R (2007) Privacy and confidentiality in prison health care. In: Greifinger RB (ed) Public Health Behind Bars. Springer, New York, pp 84\u0026ndash;100\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eCieslak TJ, Kortepeter MG, Wojtyk RJ et al (2008) Beyond SARS and smallpox: the future of infection control in the forensic setting. J Law Med Ethics. Fall;36(3):582-7\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eIuliano AD, Roguski KM, Chang HH et al (2018) Estimates of global seasonal influenza-associated respiratory mortality: a modelling study. Lancet 391(10127):1285\u0026ndash;1300\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003ePardi N, Hogan MJ, Porter FW et al (2018) mRNA vaccines - a new era in vaccinology. Nat Rev Drug Discov 17(4):261\u0026ndash;279\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eAlame MM, Massaad E, Zaraket H (2020) An overview of the advancements in influenza virus vaccines: From conventional to next generation technologies. Vaccines (Basel) 8(3):504\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eWorld Health Organization (2021) Global Influenza Strategy 2019\u0026ndash;2030. WHO, Geneva\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eHarper SA, Bradley JS, Englund JA et al (2009) Seasonal influenza in adults and children: diagnosis, treatment, chemoprophylaxis and institutional outbreak management: clinical practice guidelines of the Infectious Diseases Society of America. Clin Infect Dis 48(8):1003\u0026ndash;1032\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eGuan Y, Poon LL, Cheung CY et al (2004) H5N1 influenza: a protean pandemic threat. Proc Natl Acad Sci U S A 101(21):8156\u0026ndash;8161\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eGarten RJ, Davis CT, Russell CA et al (2009) Antigenic and genetic characteristics of swine-origin 2009 A(H1N1) influenza viruses circulating in humans. Science 325(5937):197\u0026ndash;201\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eKiseleva I, Krutikov M, Isakova-Sivak I (2022) Next-generation live attenuated influenza vaccines: Progress and challenges. Viruses 14(4):785\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eCohen MS, Chen YQ, McCauley M et al (2011) Prevention of HIV-1 infection with early antiretroviral therapy. N Engl J Med 365(6):493\u0026ndash;505\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003ePilcher CD, Tien HC, Eron JJ Jr et al (2004) Brief but efficient: acute HIV infection and the sexual transmission of HIV. J Infect Dis 189(10):1785\u0026ndash;1792\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eLittle SJ, McLean AR, Spina CA et al (1999) Viral dynamics of acute HIV-1 infection. J Exp Med 190(6):841\u0026ndash;850\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eSmith DM, Wong JK, Hightower GK et al (2005) HIV drug resistance acquired through superinfection. AIDS 19(12):1251\u0026ndash;1256\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eRichman DD, Margolis DM, Delaney M et al (2009) The challenge of finding a cure for HIV infection. Science 323(5919):1304\u0026ndash;1307\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eButler JM (2011) Advanced topics in forensic DNA typing: methodology. Academic, San Diego\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eGill P (2001) An assessment of the utility of single nucleotide polymorphisms (SNPs) for forensic purposes. Int J Legal Med 114(4\u0026ndash;5):204\u0026ndash;210\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eJobling MA, Gill P (2004) Encoded evidence: DNA in forensic analysis. Nat Rev Genet 5(10):739\u0026ndash;751\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003ePrinz M, Carracedo A, Mayr WR et al (2007) DNA Commission of the International Society for Forensic Genetics (ISFG): recommendations regarding the role of forensic genetics for disaster victim identification (DVI). Forensic Sci Int Genet 1(1):3\u0026ndash;12\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eLinacre A, Gusm\u0026atilde;o L, Hecht W et al (2011) ISFG: recommendations regarding the use of non-human (animal) DNA in forensic genetic investigations. Forensic Sci Int Genet 5(5):501\u0026ndash;505\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eBieber FR, Buckleton JS, Budowle B et al (2016) Evaluation of forensic DNA mixture evidence: protocol for evaluation, interpretation, and statistical calculations using the combined probability of inclusion. BMC Genet 17:125\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eWein LM, Craft DL, Kaplan EH (2003) Emergency response to an anthrax attack. Proc Natl Acad Sci U S A 100(7):4346\u0026ndash;4351\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eMorse SA, Budowle B (2006) Microbial forensics: application to bioterrorism preparedness and response. Infect Dis Clin North Am 20(2):455\u0026ndash;473\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eKeim P, Van Ert MN, Pearson T et al (2004) Anthrax molecular epidemiology and forensics: using the appropriate marker for different evolutionary scales. Infect Genet Evol 4(3):205\u0026ndash;213\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eKlietmann WF, Ruoff KL (2001) Bioterrorism: implications for the clinical microbiologist. Clin Microbiol Rev 14(2):364\u0026ndash;381\u003c/span\u003e\u003c/li\u003e\u003c/ol\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Forensic Science, Biohazard, HIV, Influenza, Crime Scene Investigation, Biosafety, Virology","lastPublishedDoi":"10.21203/rs.3.rs-8569968/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8569968/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003ch2\u003eBackground\u003c/h2\u003e \u003cp\u003eCrime scenes involving biological hazards from infected individuals, such as those with Human Immunodeficiency Virus (HIV) or Influenza, present unique challenges that transcend standard forensic protocols. The intersection of virology, biosafety, and criminal investigation necessitates a specialized, integrated approach to protect personnel, preserve evidence, and ensure judicial integrity.\u003c/p\u003e\u003ch2\u003eAim\u003c/h2\u003e \u003cp\u003eThis review aims to synthesize virological data on HIV and Influenza with core forensic principles to develop a comprehensive framework for the safe and effective investigation of crimes where such pathogens are a factor.\u003c/p\u003e\u003ch2\u003eMethods\u003c/h2\u003e \u003cp\u003eA descriptive review methodology was employed, integrating data from virological studies and source materials detailing Influenza and HIV with established forensic science literature, biosafety guidelines (WHO, CDC), and legal-ethical analyses.\u003c/p\u003e\u003ch2\u003eResults\u003c/h2\u003e \u003cp\u003eWe proposed a tiered response protocol anchored in risk assessment. Key challenges identified include the conflict between decontamination and DNA/RNA preservation, the interpretative complexity of viral load and strain data as evidence, and significant ethical-legal dilemmas regarding health privacy. HIV, as a stable bloodborne pathogen, requires stringent blood precautions, while Influenza, as a labile respiratory pathogen, necessitates aerosol control.\u003c/p\u003e\u003ch2\u003eConclusion\u003c/h2\u003e \u003cp\u003eInvestigating crimes involving infected individuals demands a multidisciplinary strategy. The study recommends the adoption of standardized operating procedures (SOPs) that balance biosafety and evidence integrity, continuous training for crime scene investigators (CSIs) in bloodborne and airborne pathogen risks, and clear legal frameworks to guide pathogen testing and information disclosure in criminal cases.\u003c/p\u003e","manuscriptTitle":"Forensic Investigation of Crimes Involving Diseased, HIV-Infected, and Influenza-Infected Individuals: Protocols, Challenges, and Integrated Strategies","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-01-16 09:06:08","doi":"10.21203/rs.3.rs-8569968/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"e5f00ff1-96e1-4614-9f65-62055de887f0","owner":[],"postedDate":"January 16th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-03-16T07:42:44+00:00","versionOfRecord":[],"versionCreatedAt":"2026-01-16 09:06:08","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8569968","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8569968","identity":"rs-8569968","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}