Utah Code Ann. § 80-6-502
(1) If a prosecuting attorney charges a minor with aggravated murder under Section 76-5-202 or murder under Section 76-5-203, the prosecuting attorney shall file a criminal information in the district court if the minor was a principal actor in an offense and the criminal information alleges:
(2) If the prosecuting attorney files a criminal information in the district court in accordance with Subsection (1), the district court shall try the minor as an adult, except:
(3)
(b) A minor held in a detention facility under Subsection (3)(a) shall remain in the facility:
(4)
(a) If a minor is held in a detention facility under Subsection (3)(a), the district court shall:
(5)
(a) If a minor held in a detention facility under Subsection (3)(a) attains the age of 25 years old, the minor shall:
(ii) remain in the adult jail until:
Amended by Chapter 135, 2022 General Session