Investigators have identified the man killed in a fiery crash off Interstate 680 in Alamo last month as San Francisco resident Aaron Shepard, according to the county coroner's division.
Shepard, 38, died from blunt force impact after his Acura drove out-of-control off the southbound Livorna Road off-ramp and overturned before bursting into flames around 2:40 a.m. Nov. 27, authorities said.
Authorities said they had to rely on dental records to confirm his identity, a process that took a couple weeks.
Shepard was driving at a high rate of speed when his car drove off the off-ramp, clipped a guardrail, rolled down an embankment, struck a tree and landed on its passenger side, according to the California Highway Patrol (CHP).
The Acura burst into flames with Shepard inside, but according to the coroner's office, it's unclear whether he was alive or conscious during the fire. He was pronounced dead at the scene after the fire was put out.
Investigators don't know whether drugs or alcohol were factors in the crash, with a toxicology report still pending, but they still might not find out those answers depending on the extent of damage caused by the fire, according to CHP officer John Fransen.
The investigation into the crash remains ongoing, he said.