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The reference ballistic imaging database revisited.
Jan De Ceuster1, Sylvain Dujardin1
1Nationaal Instituut voor Criminalistiek en Criminologie/Institut Nationale de Criminalistique et de Criminologie (NICC/INCC), Vilvoordsesteenweg 100, B-1120 Brussels, Belgium.
Forensic Science International
|January 24, 2015
Summary
The Evofinder system significantly improves ballistic fingerprint matching accuracy compared to older technology. However, ammunition variations still impact results, requiring extensive database comparisons for reliable identification.
Area of Science:
- Forensic Science
- Ballistics
- Firearms Examination
Background:
- A reference ballistic image database (RBID) aids firearm identification.
- Previous studies evaluated IBIS® Heritage™ technology for RBID performance.
- Technological advancements necessitate re-evaluation of automated ballistic imaging systems.
Purpose of the Study:
- To investigate the efficiency of the Evofinder® automated ballistic imaging system.
- To compare Evofinder® performance against the IBIS® Heritage™ system using an established RBID.
- To assess the impact of ammunition type on correlation results.
Main Methods:
- Utilized a reference ballistic image database previously used in a study by De Kinder et al.
- Employed the Evofinder® automated ballistic imaging system for analysis.
- Correlated cartridge case images to assess matching efficiency and correlation times.
Main Results:
- Evofinder® demonstrated a significant increase in correlation efficiency, with 38% of matches in the first position compared to 19% for IBIS® Heritage™.
- Average correlation times were comparable between Evofinder® and IBIS® Heritage™.
- Ammunition dependence strongly influenced correlation results, with 36% of potential hits appearing far down the correlation lists (position 31+).
Conclusions:
- Evofinder® offers improved performance in ballistic fingerprint matching over previous technologies.
- Ammunition-induced variations remain a challenge, necessitating thorough database verification.
- Full implementation of such databases requires further optimization to ensure high confidence in forensic identifications.
