Utah Code § 32B-4-209: Lawful detention.

(1)

(a) To inform a peace officer of a suspected violation and subject to the requirements of Subsection (1)(c), a person described in Subsection (1)(b) may:

(i) detain a person; and

(ii) hold any form of identification presented by the person.

(b) The following may take an action described in Subsection (1)(a):

(i) a state store employee;

(ii) a package agent;

(iii) a licensee or permittee;

(iv) a beer retailer; or

(v) staff of a person described in Subsections (1)(b)(ii) through (iv).

(c) A person described in Subsection (1)(b) may take an action described in Subsection (1)(a) only:

(i) if that person has reason to believe that the person against whom the action is taken is:

(A) in a facility where liquor or beer is sold; and

(B) in violation of Section 32B-4-409, 32B-4-412, or 32B-4-413;

(ii) in a reasonable manner; and

(iii) for a reasonable length of time.

(2) Unless the detention is unreasonable under all circumstances, the detention or failure to detain does not create criminal or civil liability for:

(a) false arrest;

(b) false imprisonment;

(c) slander; or

(d) unlawful detention.