GSR testing is correct in indicating what?

GSR testing is correct in indicating what?

• A. The exact model of firearm used.
• B. The only evidence needed to convict.
• C. That a firearm was discharged by the person or at the scene, under appropriate testing conditions.
• D. The time of day the shooting occurred.

Answer: (C)

GSR testing confirms that a firearm was discharged by the person or at the scene when the residues are collected and analyzed under proper testing conditions. It detects primer residue (like lead, barium, and antimony) on hands or clothing, which supports that a discharge occurred in proximity to the tested individual or location. However, it does not identify the exact firearm model and is not the sole evidence needed to convict; it must be weighed along with other facts. Residues can transfer through casual contact or from being near a discharged firearm, and they can diminish or disappear over time or with washing, so timing and proper collection are crucial for reliable results.

GSR testing confirms that a firearm was discharged by the person or at the scene when the residues are collected and analyzed under proper testing conditions. It detects primer residue (like lead, barium, and antimony) on hands or clothing, which supports that a discharge occurred in proximity to the tested individual or location. However, it does not identify the exact firearm model and is not the sole evidence needed to convict; it must be weighed along with other facts. Residues can transfer through casual contact or from being near a discharged firearm, and they can diminish or disappear over time or with washing, so timing and proper collection are crucial for reliable results.