Utah Code Title 77. Utah Code of Criminal Procedure § 77-9-3. Authority of peace officer of this state beyond normal jurisdiction

(a) when in fresh pursuit of an offender for the purpose of arresting and holding that person in custody or returning the suspect to the jurisdiction where the offense was committed;

(b) when a public offense is committed in such officer's presence;

(c) when participating in an investigation of criminal activity which originated in the officer's normal jurisdiction in cooperation with the local authority; or

(d) when called to assist peace officers of another jurisdiction.

(2)(a) Any peace officer, prior to taking any action authorized by Subsection (1), shall notify and receive approval of the local law enforcement authority, or if the prior contact is not reasonably possible, notify the local law enforcement authority as soon as reasonably possible.

(b) Unless specifically requested to aid a peace officer of another jurisdiction or otherwise as provided for by law, no legal responsibility for a peace officer's action outside his normal jurisdiction, except as provided in this section, shall attach to the local law enforcement authority.