The Cook County medical examiner's office says State Trooper James Sauter died mainly as a result of injuries from the fire that engulfed his vehicle. Autopsy results released showed thermal injuries were the main cause of death for the 28-year-old trooper, who died Friday morning while parked on the shoulder of I-294. Police say the driver of the truck that struck the trooper's car has been cited for improper lane usage, and any further charges will come following an ongoing investigation.