Swabs or Stubs? It’s Not Even A Question

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  • 1:09PM Sep 19, 2017

Gunshot Residue Analysis Gunshot residue (GSR) has long been collected during criminal investigations.  Currently, the standard method for collecting primer GSR is using adhesive stubs which can then be analyzed via scanning electron microscopy (SEM).  Prior to SEM analysis, the most common method of analyzing primer GSR was atomic absorption which utilizes cotton swabs for […]

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Ms. Alison Murtha, RJ Lee Group Forensic Scientist, Testifies on GSR in Florida Attempted Murder Trial

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  • 11:32AM Nov 15, 2012
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The Daytona Beach News-Journal reported that Ms. Alison Murtha, Forensic Scientist at RJ Lee Group laboratory in Monroeville, Pa. and testifying expert on gunshot residue (GSR), provided testimony about GSR testing performed on evidence related to the attempted murder trial of Mr. William Copeland.  Mr. Copeland is accused of shooting his ex-girlfriend’s father.  In her […]

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