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Comparison of three bullet recovery systems
Denis Werner1, Damien Rhumorbarbe1, Peter Kronseder2
1Ecole des Sciences Criminelles, Université de Lausanne, Bâtiment Batochime, 1015 Lausanne-Dorigny, Switzerland.
Forensic Science International
|August 12, 2018
Summary
This study compares bullet recovery systems for firearm identification. The water tank offers superior mark quality but is not universally compatible, while cotton and fleece systems provide alternatives with some limitations.
Area of Science:
- Forensic Science
- Ballistics
- Firearm Examination
Background:
- Firearm identification relies on comparing questioned and reference bullets.
- Producing reference bullets requires safe bullet recovery systems.
- The performance and impact of these systems on bullet markings are not well-documented.
Purpose of the Study:
- To evaluate the performance of three bullet recovery systems.
- To assess the impact of each system on the integrity of bullet markings.
- To determine the suitability of systems for various ammunition types.
Main Methods:
- Three bullet recovery systems were tested: horizontal water tank, cotton tube, and fleece.
- Seven types of ammunition were fired through each system.
- Bullets were analyzed for surface characteristics and mark quality using automated imaging.
Main Results:
- The water tank system yielded the highest quality marks but damaged certain ammunition types.
- Cotton and fleece systems are more compatible with diverse ammunition, including law enforcement rounds.
- Fleece system is more universal, though it requires post-recovery cleaning.
Conclusions:
- No single bullet recovery system is ideal for all firearm identification scenarios.
- System selection depends on ammunition type and the need for mark preservation.
- Fleece and cotton systems offer viable alternatives when water tanks are unsuitable, preserving crucial ballistic evidence.
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