Metropolitan Police Department (MPD) Block 2 Practice Test

Maintaining the integrity of a crime scene starts with creating a controlled boundary and using gear to prevent contamination. Scene tape establishes a clear perimeter so only authorized personnel enter, reducing the chance of introducing new evidence or dispersing traces. Protective equipment, such as gloves, masks, gowns, and boot covers, minimizes the transfer of contaminants from investigators to the scene and vice versa. Together, these tools directly address securing the area and preserving evidence.

Other options don’t achieve both goals. A flashlight and gloves help with visibility and basic protection but don’t establish a boundary or prevent cross-contamination across the entire scene. A camera and notebook are essential for documentation but don’t secure the scene or stop contamination. Handcuffs and a radio are for control and communication, not for securing a crime scene or preventing contamination.