Utah Code Ann. § 78A-7-106
(2) Except those offenses over which the juvenile court has exclusive jurisdiction, justice courts have jurisdiction over the following offenses committed within their territorial jurisdiction by a person who is 16 or 17 years of age:
(b) class B and C misdemeanor and infraction violations of:
(4) An offense is committed within the territorial jurisdiction of a justice court if:
(f) the investigation of the offense does not readily indicate in which court's jurisdiction the offense occurred, and:
(ii)