Detection of Gunshot Residue on Dark-Colored Clothing Prior to Chemical Analysis

• NCJ Number: 246859
• Journal: Journal of Forensic Sciences Volume: 59 Issue: 3 Dated: May 2014 Pages: 754-762
• Author(s): Kyla L. Kersh M.S.; James M. Childers Ph.D.; Dale Justice B.S.; Greg Karim A.S.
• Date Published: May 2014
• Length: 9 pages
• Publication Format: Article
• Publication Type: Report (Study/Research)
• Language: English
• Country: United States of America

Annotation

Detection of gunshot residue GSR is an arduous task for investigators.

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. Abstract published by arrangement with Wiley.