What is an essential action a security guard should take after witnessing a crime?

Notifying the appropriate authorities is a crucial action for a security guard to take after witnessing a crime. This step ensures that trained law enforcement professionals are alerted to the situation and can respond effectively. Security guards are not criminal investigators, and thus, they must rely on the expertise of police or other authorities who are equipped to handle such incidents. By contacting the authorities, the security guard helps to ensure the safety of themselves and others in the vicinity, as well as initiate an official response and investigation into the crime.

Taking this action is also vital for documentation purposes; it provides a record of the incident for future reference, which can be important for legal proceedings. Engaging in confrontation, leaving the scene, or attempting to gather evidence independently can jeopardize both the guard's safety and the integrity of the investigation. Therefore, the correct response emphasizes the importance of proper protocol in emergency situations.