Publications by authors named "Daniel S Zamzow"
This report describes an analysis of how examiners used the Association of Firearm and Toolmark Examiners (AFTE) Range of Conclusions in a controlled study undertaken to estimate examiner error rates in comparing cartridge cases. Results of the error rate analysis are reported in [1]; this paper focuses on a broader analysis of how the entire collection of classification categories, especially those in the Inconclusive range, were used by the participating examiners. Volunteer active examiners with AFTE membership or working in laboratories that participate in Association of Crime Laboratory Directors (ASCLD) were provided with 15 sets of three known and one questioned cartridge cases fired from a collection of 25 new Ruger SR9 handguns.
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- - The report details a study aimed at estimating error rates among firearm examiners in identifying or eliminating the source of cartridge cases, utilizing three known cases and one questioned case from 25 new Ruger SR9 handguns.
- - A total of 218 examiners participated, with results showing a false Elimination rate of 0.367% for same-source cases and a false Identification rate of 1.01% for different-source cases.
- - The study also found variability in the quality of marks produced across different firearms, with an overall poor-quality mark production rate of 2.3% (± 1.4%).