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Data driven optimization of sexual assault case processing.

M Bazinet1, J Larose1, S Noël1

  • 1Laboratoire de sciences judiciaires et de médecine légale, 1701 Parthenais, Montréal, Québec, H2K 3S7, Canada.

Forensic Science International. Synergy
|June 20, 2020
PubMed
Summary
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Forensic labs can improve sexual assault evidence kit processing with workflow optimization and targeted DNA analysis. These strategies reduce turnaround times without compromising investigative effectiveness in sexual assault cases.

Area of Science:

  • Forensic Science
  • Genetics
  • Criminal Justice

Background:

  • Forensic laboratories face increased sexual assault case submissions, leading to extended processing times.
  • Optimizing laboratory workflows is crucial for enhancing productivity and managing caseloads effectively.

Purpose of the Study:

  • To present two strategies for improving sexual assault evidence kit (SAEK) processing efficiency.
  • To evaluate the impact of workflow optimization and targeted analysis on turnaround times and investigative power.

Main Methods:

  • Implemented an optimized workflow prioritizing internal samples (vaginal, anal, oral) for SAEK processing.
  • Utilized casework data to identify cases with a higher probability of yielding perpetrator DNA.
  • Analyzed the likelihood of obtaining perpetrator DNA under specific circumstances (condom use, showering, memory loss).
Keywords:
DNA profileSexual assault evidence kit (SAEK)Skin swabTime since intercourse (TSI)Washing

Related Experiment Videos

Main Results:

  • The optimized workflow significantly decreased turnaround times for SAEK processing.
  • Targeted analysis based on casework data aims to focus resources on high-probability cases.
  • Circumstances like condom use, showering, or memory loss did not substantially reduce the probability of detecting perpetrator DNA.

Conclusions:

  • Workflow optimization and strategic targeting of cases can enhance forensic laboratory productivity for sexual assault cases.
  • The findings support the continued analysis of samples even when certain post-assault actions by the complainant are reported.
  • These strategies help balance efficiency with the critical need for thorough forensic investigation.