(San Juan County, UT)  –  A teen is behind bars facing a slew of charges after a deadly car crash in the early morning hours after a San Juan County prom in March.  The unnamed now 18-year-old is facing two automobile homicide charges in addition to six other charges following his arrest yesterday.  Investigators say the suspect, who was 17 at the time of the March Fifth crash, was driving more than twice the speed limit on Lasal Loop Road when he crashed, killing 14-year-old Taylor Bryant and 16-year-old Connor Denney.  A third passenger remains in critical condition at the hospital.  Investigators think alcohol was involved. Â