Legal Authority and Use of Force
The Central Truth
An Arizona security guard is a private citizen with no greater police authority than any other person. Authority comes from the property owner or employer (contract, posted rules, premises access) and from the same citizen-arrest and self-defense statutes that bind everyone. The guard's power is essentially the power to observe, report, deter, and detain briefly under citizen's arrest, not to investigate or punish.
Key Concepts to Master
Know the citizen's arrest rule: a private person may arrest someone for a felony committed in the person's presence, or for a misdemeanor breach of the peace committed in the presence - and must deliver the person to a peace officer without unnecessary delay. Understand self-defense and defense of others (reasonable force against imminent unlawful force), defense of premises (limited), and that force likely to cause serious injury or death is reserved for threats of serious injury or death. Know that deadly force cannot be used to protect property alone. Understand the detention limits: a guard may use reasonable, non-deadly force to detain, must not prolong detention unreasonably, and must hand over to police promptly. Know Fourth Amendment limits: a private guard acting on private property is generally not a state actor, but becomes one when acting at police direction.
Traps in Questions
- "The guard may search the bag because he is security" - consent, contract, or police involvement usually matters.
- Confusing detention with arrest; a detainee must be turned over promptly.
- Believing a badge grants authority; it does not.
- Using force to recover property after the fact rather than to stop a present crime.
Rule of Thumb
Force must be proportional, necessary, and aimed at stopping an imminent threat - never at punishment or at protecting property alone.
Worked Example
A guard sees a shoplifter run out with merchandise. The guard may not tackle or strike to recover goods, but may note a description, direction, and vehicle, and may make a citizen's arrest only if a qualifying offense occurred in his presence, using only reasonable force and calling police promptly.