Gunshot Residue

Gunshot Residue (GSR) is a mixture of particles that are expelled from a firearm when it is discharged. It is composed of tiny fragments of unburnt gunpowder, lead, antimony, and barium, which can be detected on clothes, skin, and other surfaces. GSR analysis is a highly valuable tool for forensic investigators as it can provide evidence that a weapon was fired, and can also be used to link a suspect to a firearm. GSR evidence can also help determine the range from which a gunshot was fired and identify a suspect’s clothing. Furthermore, GSR can be used to understand the dynamics of a shooting, and can be used to help reconstruct a crime scene.