Name one reason a security guard might need to contact law enforcement.

A security guard might need to contact law enforcement primarily when witnessing a crime or potential threat that requires legal intervention. This is crucial because security guards are often the first line of defense in protecting people and property. When they observe any criminal activities, such as theft, assault, or vandalism, it is their responsibility to act, which may involve immediately notifying law enforcement to ensure that the situation is appropriately handled and that the safety of individuals is prioritized.

This situation emphasizes the guard's role in maintaining safety and security within their assigned area. The timely involvement of law enforcement can prevent further escalation of threats, whether to property or public safety, allowing trained professionals to tackle the situation effectively.

Other choices, while they may have some merit in certain contexts, do not represent urgent or legal obligations in the same way. For example, contacting law enforcement for routine guidance or administrative questions is not the primary function of a security guard and does not typically arise in critical, emergency scenarios. Conducting an internal investigation is also outside the realm of law enforcement action and usually falls under the purview of the organization itself.