Gunshot residue analysis

Gunshot residue (GSR) analysis involves examining tiny particles left on a person's hands, clothing, or nearby surfaces after a firearm has been fired. These residues typically contain traces of mercury, lead, barium, and antimony, which come from the primer and gunpowder. Using specialized tools like microscopy and chemical tests, forensic experts can detect and identify GSR to determine if someone recently fired a gun or was in close proximity to gunfire. This analysis helps in criminal investigations by establishing evidence of firearm use or handling.