The effect of primer cap material on ballistic toolmark evidence

Interpol review of forensic firearm examination 2019–2022

“…Addinall et al discuss the differences in the overall topography of firing pin impressions in different primer cup materials, and the effect it has on the successful correlation of ballistic toolmarks evidence [ 15 ]. Material composition of the primer cup has an effect on the areal topography of the firing pin impression, and therefore on the correlation results (Alias ballistic imaging systemTM).…”

Forensic comparison of fired cartridge cases: Feature-extraction methods for feature-based calculation of likelihood ratios

“…Published research on statistical models for comparison of fired cartridge cases has made use of training and validation datasets that are relatively small. Some existing datasets consist of a large number of fires from a small number of firearms, e.g., 10–60 test-fires from each of 1–5 firearms (Thumwarin [ 10 ]; Liong et al [ 11 ]; Ott et al [ 12 ]; Addinall et al [ 13 ]), and others consist of a small number of fires from a somewhat larger number of firearms, e.g., 1–4 test-fires from each of 10–90 firearms (Xin et al [ 14 ]; Legrá et al [ 15 ]; Fadul et al [ 16 ]). 5 In addition, only a subset of the datasets used in published research have themselves been published and made available to other researchers and practitioners.…”

Batch Filing System of Bullets’ Rifling Traces Based on Point Laser Detection

“…Gun-related cases have caused great harm to people's lives and property and the stability of social order and are the key targets of public security organs at all levels. (1) The traces of bullets have the characteristics of not easy to destroy, difficult to camouflage, uniqueness, and good identification value. An accurate and rapid determination of the type of gun used to commit a crime is extremely important for the resolution of gun cases.…”