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National fingermark visualisation collaborative exercise 2020
Shannon Vassell1, Helen Bandey1
1Defence Science Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK.
Summary
Forensic laboratories demonstrated proficiency in fingermark visualisation on challenging semi-porous surfaces. The national exercise identified key learning points to enhance future fingermark detection processes.
Area of Science:
- Forensic Science
- Trace Evidence Analysis
Background:
- The Defence Science and Technology Laboratory conducted a UK national collaborative exercise on fingermark visualisation in 2020.
- This exercise aimed to assess the capabilities of laboratories in visualizing fingermarks on challenging substrates, specifically semi-porous wrapping paper.
Purpose of the Study:
- To evaluate the operational practices of forensic laboratories in fingermark visualisation.
- To identify best practices and areas for improvement in fingermark detection techniques on difficult surfaces.
- To provide assurance to the Forensic Science Regulator regarding laboratory performance.
Main Methods:
- 23 laboratories from 21 organizations participated in the exercise.
- Participants were tasked with visualising fingermarks on a standardised piece of semi-porous wrapping paper, treated as a major crime exhibit.
- Variations in planning and processing approaches were anticipated due to substrate complexity.
Main Results:
- Participating laboratories generally performed well in fingermark visualisation.
- Key learning points were identified concerning decision-making, planning, and implementation of visualisation processes.
- The exercise provided insights into current operational practices, highlighting areas of good practice and potential adaptations.
Conclusions:
- The exercise confirmed the general capability of laboratories to visualise fingermarks, offering assurance to the Forensic Science Regulator.
- Understanding of fingermark visualisation success is enhanced through identified learning points.
- The findings and lessons learned were disseminated via a workshop in summer 2021 to further improve practices.
