Gunshot Residue (GSR) Collection

Physical Evidence Bulletin

California Department of Justice, Bureau of Forensic Services

   See also the instructional videos on "Evidence Collection"

Purpose

This PEB pertains to sampling and examination for the presence of GSR. For guidelines pertaining to distance determination, please refer to PEB 12 (Firearms Examination).

The Physical Evidence Bulletin (PEB) is a guideline intended for law enforcement agencies to follow when submitting evidence to Bureau of Forensic Services (BFS) Laboratories. Physical Evidence Bulletins are not intended to be used in lieu of training in the collection of evidence.

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Read the Physical Evidence Bulletin:

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