EMALB First Responders (FR) Practice EXAM

What is one principle NOT recommended for preserving evidence at a crime scene?

1. Use gloves when handling evidence

2. Document the scene thoroughly

3. Insert a pen into the barrel of a gun to avoid contamination

4. Keep the scene undisturbed as much as possible

The correct answer is: Insert a pen into the barrel of a gun to avoid contamination

Using a pen to insert into the barrel of a gun is not a recommended practice for preserving evidence at a crime scene because it can introduce foreign materials that may contaminate the evidence. This action can compromise the integrity of the firearm and any potential forensic data associated with it, such as fingerprints, trace evidence, and biological materials. Proper evidence preservation requires avoiding any actions that could alter the physical condition or the forensic value of the evidence. In contrast, wearing gloves while handling evidence, thoroughly documenting the scene, and keeping the area undisturbed are all essential practices. Wearing gloves minimizes the risk of contaminating evidence with your own DNA or other biological material. Thorough documentation captures critical details, supporting forensic analysis and legal proceedings. Keeping the scene as undisturbed as possible prevents the alteration or loss of evidence, ensuring that investigative processes can proceed unimpeded.