Gunshot residue

Gunshot residue (GSR) is one of the results of firing a gun. When a bullet leaves the barrel of a firearm, it is accompanied by gases that include both burned and unburned particles of gunpowder. It also includes traces of metal from the firearm, the ammunition and the primer including the signature components of gunshot residue: lead, barium and antimony.[1] GSR is usually found on the skin and clothing of the person who fired the gun.[2] It may also be found in the entrance wound of the victim.[3] This depends on how close the victim was to the gun when it was fired.

  1. Allison C. MurthaLinxian Wu (27 September 2012). "The Science Behind GSR: Separating Fact from Fiction". Forensic Magazine. Archived from the original on 6 December 2015. Retrieved 20 January 2016.
  2. "Examination of Gunshot Residue". The University of Utah, Spencer S. Eccles Health Sciences Library. Retrieved 20 January 2016.
  3. "Gunshot Residue Collection". Minnesota Department of Public Safety. Archived from the original on 2 November 2020. Retrieved 20 January 2016.

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