What is the appropriate action when an intruder is detected on secure premises?

When an intruder is detected on secure premises, the most appropriate action is to alert law enforcement while monitoring the situation. This response ensures that professional authorities who are trained to handle such situations can arrive and take over, potentially preventing any escalation of the matter. By maintaining a watchful eye on the intruder, the security guard can gather critical information that can assist law enforcement upon their arrival, such as the intruder's appearance, behavior, and direction of movement.

This approach balances the need for safety with the responsibility to protect the premises. Attempting to confront the intruder immediately poses significant risks, both to the security guard and others in the vicinity, as intruders may react violently or unpredictably. Setting off the building alarm can alert others to the situation, but without ongoing monitoring, key details may be lost and the security personnel might be left vulnerable. Ignoring an intruder is never advisable, as it may lead to theft, vandalism, or even personal harm. Therefore, alerting law enforcement while keeping a close eye on the intruder is the safest and most effective action to take in this scenario.