A security guard should contact law enforcement when they encounter a serious crime or emergency situation because their primary role is to ensure the safety and security of the premises and individuals within it. In such critical circumstances, immediate professional intervention is typically necessary to manage the situation effectively. Serious crimes can include incidents such as robbery, assault, or any situation where an individual’s safety is at risk, requiring the expertise and authority of law enforcement officers to respond swiftly and appropriately.
While completing a routine patrol, witnessing a minor disturbance, or receiving a complaint from a visitor may require the guard's attention, these scenarios usually do not necessitate an immediate call to law enforcement. For minor disturbances, a security guard can often handle the situation directly by de-escalating it or monitoring until it resolves. Complaints from visitors may be addressed internally and do not automatically indicate a need for law enforcement involvement unless they escalate into a serious situation. Thus, the protocol is to reserve contacting law enforcement for scenarios that present a significant threat or criminal activity.