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DNA Transfer in Forensic Science: Recent Progress towards Meeting Challenges.

Roland A H van Oorschot1,2, Georgina E Meakin3,4, Bas Kokshoorn5,6

  • 1Office of the Chief Forensic Scientist, Victoria Police Forensic Services Department, Macleod, VIC 3085, Australia.

Genes
|November 27, 2021
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Summary

Recent research addresses challenges in DNA transfer, persistence, prevalence, and recovery (DNA-TPPR) to improve DNA activity level evaluations. Efforts focus on enhancing forensic expert guidance for the judiciary regarding DNA transfer evidence.

Keywords:
DNA persistenceDNA prevalenceDNA recoveryDNA transferactivity level evaluationforensic science

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Area of Science:

  • Forensic Science
  • Molecular Biology
  • Genetics

Background:

  • Understanding DNA transfer, persistence, prevalence, and recovery (DNA-TPPR) is crucial for DNA activity level evaluations.
  • Previous reviews highlighted the need for further research to support these evaluations.
  • Challenges exist in assigning probabilities to DNA quantities and profile types obtained in forensic scenarios.

Purpose of the Study:

  • To review and synthesize recent research on DNA-TPPR published since 2018/2019.
  • To explore actions taken by stakeholders to address identified research gaps in DNA-TPPR.
  • To assess progress in improving forensic experts' capacity for DNA transfer evaluations.

Main Methods:

  • Literature review of DNA-TPPR articles published post-2018.
  • Synopsis of key findings from relevant research.
  • Exploration of industry stakeholder initiatives and actions.

Main Results:

  • Significant research has been conducted in recent years to address DNA-TPPR challenges.
  • Stakeholders have taken steps to bridge identified gaps in DNA transfer knowledge.
  • Ongoing efforts aim to enhance the reliability of DNA evidence evaluations.

Conclusions:

  • Substantial progress has been made in understanding DNA-TPPR factors.
  • Continued research and collaborative efforts are vital for robust DNA activity level evaluations.
  • Improvements in DNA-TPPR research enhance forensic guidance for judicial decision-making.