Final answer:
Yes, a person can test positive for gunshot residue (GSR) even if they didn't fire a gun. GSR particles can be transferred from surfaces or objects in the vicinity of a fired gun and can also be transferred from individuals who have been in close proximity to a fired gun. Forensic experts can analyze swabs from hands, clothing, or other items to detect the presence of GSR.
Step-by-step explanation:
Yes, a person can test positive for gunshot residue (GSR) even if they didn't fire a gun. GSR consists of tiny particles that are released from the firearm when it is discharged and can be transferred to surfaces and objects in the vicinity. These particles can also be transferred from individuals who have been in close proximity to a fired gun or even from handling items that have recently been in contact with GSR.
Forensic experts can analyze swabs from the hands, clothing, or other items to detect the presence of GSR. However, it is important to note that the absence of GSR does not necessarily mean that a person did not fire a gun, as factors such as distance from the gun, the type of firearm, and the presence of barriers can affect the transfer and persistence of GSR particles.