An Alta High student remained in critical condition Friday at LDS Hospital following a Wednesday auto-motorcycle accident in Sandy.

Derek Stoker, 18, who was driving the motorcycle, suffered a broken jaw and a concussion following the 9 a.m. accident at 10860 S. 1300 East. A passenger, Chad Heseltine, 18, Sandy, was treated at Alta View Hospital for scrapes and bruises before being released.Police said Stoker was driving south on 1300 East at an estimated 55 mph when he struck the rear of a car driven by a West Jordan youth. Police said the 17-year-old youth apparently changed lanes in front of the motorcycle and was slowing to make a U-turn when the accident occurred.

Neither Stoker or Heseltine were wearing helmets. Police said it appeared Stoker slid along the ground nearly 95 feet before striking his head on a raised concrete street island. The investigation is continuing.