What should a security guard do if they witness a crime in progress?

When a security guard witnesses a crime in progress, the most appropriate course of action is to call for back-up and report the crime to authorities. This response is essential because it prioritizes safety and ensures that professionals who are trained to handle such situations can take over the response. By notifying authorities, the security guard can provide necessary details that may assist law enforcement in responding effectively to the incident.

Attempting to intervene personally can escalate the situation and put the guard, bystanders, or even the suspects in danger. It's crucial for security personnel to act within their scope of training and authority, which often does not include direct intervention in criminal acts. Recording the incident could also be helpful later, but it should not be the primary focus when immediate action is required. Lastly, waiting to see what happens does not contribute to a safe or effective response to the crime and may allow it to escalate further without intervention. Therefore, calling for back-up and reporting to the authorities is the most responsible and effective action a security guard can take in this scenario.