Developing a quality assurance program for gunshot primer residue analysis

Thomas R. White

doi:10.1117/12.2073770

16 September 2014 Developing a quality assurance program for gunshot primer residue analysis

Thomas R. White

Proceedings Volume 9236, Scanning Microscopies 2014; 92360K (2014) https://doi.org/10.1117/12.2073770
Event: SPIE Scanning Microscopies, 2014, Monterey, California, United States

Abstract

The Texas DPS Crime Laboratory Service analyzes an average of 45 gunshot residue (GSR) kits a month using three different SEM/EDS systems and involving four different analysts. To maintain the volume of cases, we have developed a robust, cost-efficient method to ensure that all three systems are performing automated GSR analysis within laboratory specifications, and yielding consistent results across all three systems. This analysis commonly includes analysis of GSR kits collected from suspects’ hands, but can also include kits from screening of suspects’ clothing for GSR. Analysts have developed procedures for cleaning and monitoring areas where clothing and GSR stubs are processed and analyzed in order to ensure that casework stubs were not contaminated in the laboratory.

Citation Download Citation

Thomas R. White "Developing a quality assurance program for gunshot primer residue analysis", Proc. SPIE 9236, Scanning Microscopies 2014, 92360K (16 September 2014); https://doi.org/10.1117/12.2073770

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