What should not be done when handling spent bullets?

When handling spent bullets, marking their side for identification might compromise the integrity of the evidence. Any alterations or markings made directly on a bullet can affect its forensic analysis, particularly in relation to ballistic testing or comparisons. Preserving evidence in its original condition is essential for maintaining its reliability in court.

In contrast, wrapping the bullets carefully, placing them in a secure vial, and sealing them with a gummed label are all procedures that help ensure the evidence is protected and can be tracked throughout the investigative process. These methods focus on maintaining the physical integrity and chain of custody of the evidence, which is crucial in legal contexts.