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Performance Evaluation of a Registered Ballistic Database Using the Evofinder® System
Author(s) -
Li Yuesong,
Lin Sheng,
Luo Yaping,
Mi Zhongliang
Publication year - 2019
Publication title -
journal of forensic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.715
H-Index - 96
eISSN - 1556-4029
pISSN - 0022-1198
DOI - 10.1111/1556-4029.14054
Subject(s) - cartridge , ammunition , database , forensic engineering , aeronautics , computer science , engineering , archaeology , history
Abstract Firearms for police in China are registered along with their fired bullets and cartridge cases. A Registered Ballistic Database ( RBD ) of 1000 Norinco QSZ ‐92 pistols with registered ammunition was established and was evaluated through the Evofinder® system. In this research, 1000 bullets and 1000 cartridge cases were randomly selected and correlated against an RBD of 2996 bullets and 2999 cartridge cases. Examiners found that successful identifications all ranked 1st, supported with land (100%), groove (97%) engraved areas, and primary marks (85.6%) for bullets, and firing pin impressions (99.8%), and breech face marks (99.9%) for cartridge cases. Two known matches ( KM ) for the same pistol rank in the top two (100%). The distribution of similarity scores varies from marks; however, the Evofinder® system could still effectively distinguish known matches from known nonmatches ( KNM ) for either bullets or cartridge cases. This study demonstrates the efficiency of the RBD .