The death of a Rock Springs man in a car fire has been determined to be an accident. 47-year-old Michael Lee Tinnie was killed in a car fire in Sweetwater County on February 15th. Fire crews were dispatched to the fire west of Rock Springs at the base of White Mountain where a silver 2006 Dodge was in flames. Investigators say Tinnie’s car had become high-centered and stuck and it was believed the heat from the exhaust system and/or catalytic converter may have started the blaze. An autopsy determined Tinnie’s cause of death was asphyxia due to smoke inhalation with no indications of foul play.