Table of Contents
What is GSR and how does it affect a firearm?
Firearms examiners use this type of GSR to determine the distance between the muzzle of a gun and a target. When forensic trace evidence examiners receive a request to look for GSR on the hands or clothing of a suspected shooter, they search for residue from the primer.
How can we improve the interpretation of gunshot residue results?
Recently, technological advances have made particle analysis quicker and easier, but most current research involves the interpretation of results. Communication among SEM gunshot residue analysts has inspired research and studies that, in turn, have brought about enhanced understanding and increased confidence in GSR interpretation.
How have GSR examinations changed over the years?
Research and advancements in technology have brought changes to gunshot residue (GSR) examinations over the past several years.
Why do some FBI laboratories not accept GSR cases?
In addition, laboratories must consider the personnel, instrumentation, and time available for the work involved. As one example, the FBI Laboratory no longer accepts GSR cases because of a decision that its resources would serve its community, the United States, better when directed toward fighting terrorism. 12
How do police look for gunshot residue?
When forensic trace evidence examiners receive a request to look for GSR on the hands or clothing of a suspected shooter, they search for residue from the primer. Mr. Trimpe, a trace evidence examiner with the Hamilton County Coroner’s Office in Cincinnati, Ohio, is the chairman of the Scientific Working Group on Gunshot Residue.
How do you get gunshot residue off your hands?
Gunshot residue particles can be removed easily from the surfaces they land on. Regular activities, such as putting hands in pockets, rubbing hands together, or handling items, can wipe them away.4 The washing of hands can remove most, if not all, particles.