The short answer
An Arizona security guard does not receive police arrest powers merely by being licensed or employed as a guard. State law expressly says guards are not peace officers and perform their duties as private citizens. Arizona does recognize a limited private-person arrest authority, but it applies only under specific statutory circumstances and should not be treated as routine security practice.
What to know
Under A.R.S. §13-3884, a private person may make an arrest when a misdemeanor amounting to a breach of the peace or a felony is committed in that person’s presence, or when a felony has in fact been committed and the private person has reasonable grounds to believe the individual committed it. Applying that statute incorrectly can create safety, civil-liability, and criminal-law consequences. The facts, level of force, duration, communication, transfer to police, and other circumstances all matter.
For most assignments, the safer operational emphasis is observation, de-escalation, accurate descriptions, preservation of evidence, prompt notification to police and the client, and compliance with written post orders. A guard may also ask a person to leave private property when authorized by the owner, but escalating a refusal is not automatically the same as having police powers. This is general information, not legal advice. Arrow and each client should have Arizona counsel approve any detention, private-person arrest, search, or use-of-force policy.