What is the typical method for collecting gunshot residue (GSR) from a suspect?

Using adhesive tape to lift residues from the hands of a suspect is the standard method for collecting gunshot residue (GSR). This technique is preferred because it can effectively capture the microscopic particles associated with the discharge of a firearm, which may include lead, barium, and antimony. The adhesive properties of the tape allow it to pick up these tiny particles directly from the skin without transferring or contaminating them during the collection process.

This method minimizes the risk of losing residues and ensures that enough material can be collected for analysis, which typically involves chemical tests that can determine if the particles are indeed GSR. By adhering directly to the skin in areas most likely to have come into contact with GSR—such as the hands—the tape can provide a reliable sample for forensic investigation, supporting various legal proceedings and criminal cases.