Arraignment of two Layton youths charged in the Aug. 8 shotgun attack on a Utah Highway Patrol trooper was postponed Thursday without a new date being set.

The two, Jared Valentine, 18, 631 E. 20th North, and Michael Polete, 17, 610 E. 20th North, were scheduled for arraignment in Layton 2nd Circuit Court on attempted first-degree murder.Law enforcement officials charged Polete, a juvenile, as an adult because of the seriousness of the crime and the proximity of his 18th birthday, they said. But defense attorney Stan Smedley has petitioned the court to have Polete declared a juvenile.

The preliminary hearing on the two will be rescheduled after Polete's status is determined, a court spokesman said.