Which of the following is NOT a guideline for approaching a crime scene?

Leading the investigation until law enforcement arrives is not a guideline for approaching a crime scene. The primary responsibility of security personnel at a crime scene is to maintain the integrity of the scene and ensure that it is not disturbed before law enforcement can take over. It is essential to recognize the limits of one's authority and expertise. Security guards should provide support, such as securing the area and aiding victims, but they are not trained investigators and should not initiate or lead the investigative process.

In contrast, complying with requests for assistance, protecting the scene without disturbing evidence, and cooperating fully with law enforcement are critical actions that help maintain order and support the investigation. These guidelines emphasize the importance of collaboration with law enforcement and proper scene management to preserve evidence and support the investigative process.