Which action is NOT recommended at a crime scene?

Talking over evidence at a crime scene is not recommended because it can compromise the integrity of the evidence. Clear communication is essential in preserving the details and context of the scene, and discussing evidence aloud can lead to contamination, confusion, or unintended alterations to the scene. By refraining from discussing evidence, investigators can ensure that they are maintaining a clear and objective record of the information surrounding the crime scene.

In contrast, changing gloves frequently, wearing personal protective equipment (PPE), and using sterilized equipment are all best practices that help maintain the chain of custody and avoid cross-contamination. These practices help to protect both the crime scene and the investigators involved by minimizing the risk of losing important evidence or introducing foreign substances that can alter the scene or the evidence collected.