What must a security officer do if they encounter a resisting suspect?

A security officer should call law enforcement for assistance when encountering a resisting suspect because this action ensures that trained professionals handle the situation appropriately. The presence of law enforcement can provide the necessary authority and additional resources that a security officer may lack.

Attempting to physically restrain a suspect might escalate the situation and can lead to potential injury for both the officer and the suspect, as well as legal consequences for the security officer if the use of force is deemed excessive. Engaging in conversation could be ineffective and may further provoke the suspect, while exiting the area might neglect the officer's duty to maintain safety or security in the vicinity. Therefore, alerting law enforcement is the most responsible and effective course of action.