Determining the effect of cartridge case coatings on GSR using post-fire priming cup residue

Forensic Science International : Synergy
Molly TerryCandice M Bridge

Abstract

Ammunition is typically composed of a lead-based priming mixture which contributes to the characteristics most commonly used for the identification of gunshot residue (GSR). Due to the health risks often associated with lead, the use of lead-free primers in ammunitions is becoming more popular. Thus, the presence of GSR is becoming more difficult to discern based on the traditional means, i.e. the presence of lead (Pb), barium (Ba), and antimony (Sb). While research has been conducted on the differences between lead-based and lead-free muzzle discharge residue, few have researched other components of ammunition which may lead to other means of characterizing GSR. This research, therefore, covers that gap by focusing on the priming cup present in ammunition and the residue which may originate from it, that can contribute to muzzle discharge residue. In this study, a lead-based and a lead-free ammunition from four different manufacturers were chosen. The cartridges were fired using a Glock 17, 9mm Parabellum, collected post-fire, and subsequently de-primed resulting in the removal of the anvil. The GSR present on the anvils and cups was analyzed using scanning electron microscopy coupled with energy dispersive x-ray spectrometry ...Continue Reading

Citations

Feb 14, 2020·International Journal of Legal Medicine·Sabrina RomanòFrancesco Saverio Romolo
Jan 2, 2021·Forensic Science International : Synergy·Sébastien CharlesBart Nys
Nov 9, 2018·Analytical Chemistry·Ewelina MistekIgor K Lednev

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