UPDATE Tuesday 8 a.m. A Contra Costa County Coroner's representative has said that Yee died of "blunt force trauma to the head," but that the "manner of death is pending."
MONDAY: An autopsy was to be performed this morning on Joel Aaron Yee, 20, who died late Saturday night after flinging himself out of a car on Highway 24 between Lafayette and Walnut Creek.
A Contra Costa Coroner's deputy confirmed that the case is being treated as a possible suicide.
The California Highway Patrol said Yee jumped out of the passenger seat of a Honda Accord traveling 70 mph on westbound Highway 24 just east of Pleasant Hill Road. The incident occurred just after 11 p.m.
Yee landed on the right shoulder. After the Accord's driver and a passing motorist called 911, the motorist tried resuscitating him with CPR, but emergency crews declared him dead at the scene.