What is a trace from a bullet?

A trace from a bullet refers to the microscopic markings or residues left on a bullet after it is fired, which can include striations, impressions, and chemical residues. These traces can help forensic experts link a bullet to a specific firearm by analyzing the unique patterns created by the gun's barrel and the ammunition used. Additionally, traces may include gunshot residue found on a shooter's hands or clothing, which can provide evidence of recent firearm use. Analyzing these traces is crucial for criminal investigations to establish connections between suspects, firearms, and crime scenes.