What course of action must a security officer take if they witness a crime in progress?

When a security officer witnesses a crime in progress, the proper course of action is to immediately call law enforcement. This response is crucial for several reasons. First, contacting authorities ensures that trained professionals can respond to the situation effectively and safely. Law enforcement is equipped to handle criminal activity, while security officers often have limitations in their authority and training, especially when it comes to engaging with suspects.

Additionally, reporting the crime allows the officer to provide detailed information about the incident, which can aid law enforcement in responding appropriately. The information might include the nature of the crime, the description of the suspect, and the location, which are vital for a timely and effective response.

Other actions, such as ignoring the crime, attempting to apprehend the suspect, or merely conducting surveillance, may lead to dangerous situations. Ignoring the crime doesn't protect the public or enforce safety, while attempting to apprehend a suspect can escalate violence and put the officer and others in harm’s way. Conducting surveillance until backup arrives might delay crucial action and allow the situation to deteriorate further.

In summary, immediately calling law enforcement is the correct action because it maximizes safety, ensures professional handling of the situation, and promotes a prompt response to criminal activity.