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Journal Article

Citation

Kersh KL, Childers JM, Justice D, Karim G. J. Forensic Sci. 2014; 59(3): 754-762.

Affiliation

Texas Tech University, Institute for Forensic Science, 4434 South Loop 289, Lubbock, TX.

Copyright

(Copyright © 2014, American Society for Testing and Materials, Publisher John Wiley and Sons)

DOI

10.1111/1556-4029.12409

PMID

24634985

Abstract

Detection of gunshot residue (GSR) is an arduous task for investigators. It is often accomplished with chemical tests, which can reveal elements and ions indicating the presence of GSR, but are likely to cause physical alteration to the pattern. In this study, the Spex Forensics Mini-CrimeScope MCS 400, along with 16 accompanying wavelength filters, was applied to various GSR patterns and target types. Three dark shirt materials, four ammunition calibers, and eight ammunition manufacturers, along with the primer residue of the different manufacturer ammunitions were tested.

RESULTS indicate the alternate light source wavelength of 445 nm to be the optimal setting. In addition, target material plays a large role in the preservation of GSR patterns as particles burn. Furthermore, it can be extrapolated that residue, observed from a full round and firing distance of six inches, is mostly composed of unburnt gunpowder residue, not primer residue.


Language: en

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