Dos Santos Lehi Sudy, Vieira Muterlle Palloma
Federal Police - National Forensic Institute, SAIS Quadra 07 Lotes 09/10, Asa Sul Brasília, DF, CEP: 70610-200, Brazil.
Materials Laboratory, Brasilia University, Darcy Ribeiro Campus, Bloco SG9, Asa Norte Brasília, CEP: 70910-900, DF, Brazil.
J Forensic Sci. 2018 Nov;63(6):1846-1853. doi: 10.1111/1556-4029.13771. Epub 2018 Mar 1.
Factors influencing effectiveness of automated comparisons, test-fired bullets, and cartridge cases from 0.38 Special revolvers were logged into the Evofinder Ballistic ID System. Tests were performed as follows: First test correlated test-fires of the same type, second test compared different types of ammunition components, third test replicated the second test in a larger database, and fourth test replicated the third test with students having no previous firearm identification experience. System effectiveness with projectiles in the first test was 0.89. With cartridge cases, effectiveness was 0.79 with combined results, but analysis of separate results by breech face and firing pin revealed low effectiveness by breech face (0.40). In the second, third, and fourth tests, effectiveness with projectiles were 0.61, 0.51, and 0.44. In addition, these tests had effectiveness with cartridge cases equivalent to 0.55, 0.43, and 0.44. Results are useful to establish routine protocols, system improvements, or comparative assessment of other electronic systems.
影响0.38特种左轮手枪自动比对、试射子弹和弹壳有效性的因素被录入到Evofinder弹道识别系统中。测试按以下方式进行：第一次测试关联相同类型的试射；第二次测试比较不同类型的弹药部件；第三次测试在更大的数据库中重复第二次测试；第四次测试让没有枪支识别经验的学生重复第三次测试。第一次测试中，系统对射弹的有效性为0.89。对于弹壳，综合结果的有效性为0.79，但按枪膛表面和撞针分别分析结果显示，枪膛表面的有效性较低（0.40）。在第二、第三和第四次测试中，射弹的有效性分别为0.61、0.51和0.44。此外，这些测试中弹壳的有效性分别为0.55、0.43和0.44。这些结果对于建立常规协议、改进系统或对其他电子系统进行比较评估很有用。
