The short answer
Private guards handle these calls by observing, assessing immediate safety, communicating professionally, following the property’s post orders, documenting facts, and escalating to management or police when appropriate. They do not gain police authority through employment; Arizona security guards act as private citizens.
What to know
For suspected trespassing, the officer should verify property boundaries and the client’s authority, identify the applicable property rule or notice, and follow approved procedures for requesting that an unauthorized person leave. Noise or loitering complaints require objective observation when possible—not an assumption that a complaint is automatically accurate. Suspicious activity should be described through behavior, location, clothing, vehicle, time, and direction of travel rather than unsupported conclusions about identity or intent.
If there is violence, a weapon, forced entry, a crime in progress, a serious medical need, or an immediate threat, call 911 and avoid unnecessary confrontation. For lower-risk issues, use de-escalation, notify management, and document the complainant’s report separately from the officer’s observations. Post orders should address repeat incidents, trespass notices, resident or guest status, juvenile contacts, body-camera or photo rules, and when officers disengage. Any detention, search, removal, or use-of-force policy requires Arizona legal review and assignment-specific training.