Ariz. Rev. Stat. § 13-410
A. The threatened use of deadly physical force by a person against another is justified pursuant to section 13-409 only if a reasonable person effecting the arrest or preventing the escape would believe the suspect or escapee is:
C. The use of deadly force by a peace officer against another is justified pursuant to section 13-409 only when the peace officer reasonably believes that it is necessary:
2. To effect an arrest or prevent the escape from custody of a person whom the peace officer reasonably believes: