Which of the following should you NOT do at a crime scene?

Eating or drinking at a crime scene is not advisable for several critical reasons. First, it poses the risk of contaminating evidence. Forensic investigations rely on the preservation of physical evidence, and introducing outside substances—like food or drink—could compromise the integrity of the scene and the evidence collected. Furthermore, consuming food or beverages can create potential health hazards, especially if there are biological or chemical risks present at the scene.

Maintaining a clean and controlled environment is essential for investigators, ensuring that they do not inadvertently alter the evidence or put themselves in danger. It's crucial for crime scene investigators to remain focused on their tasks and be fully attentive to their surroundings without the distraction of eating or drinking. Therefore, refraining from these activities is a vital practice in preserving the integrity of the crime scene and the safety of those present.