Which of the following is an essential characteristic of gunshot residue (GSR) evidence collection?

The collection of gunshot residue (GSR) evidence is extremely sensitive and requires careful handling to preserve the integrity of the evidence. The use of gloves is essential because it prevents contamination of the samples. If the collector's hands come into contact with the surfaces being tested, there is a risk of transferring substances that could interfere with the test results or compromise the evidence. This is crucial in forensic contexts where the accuracy of the evidence is paramount in demonstrating an individual's involvement in a shooting incident.

Utilizing gloves not only protects the evidence but also ensures that the collector does not inadvertently deposit their own residues onto the surfaces being sampled. Proper protocols for collection, including wearing gloves, help maintain the chain of custody and bolster the credibility of the findings in a legal context.