The Coroner's office tells "Extra" that the remains have been identified and that Walker was a passenger in the Porsche Carrera GT. Due to the nature of the accident, the bodies were badly burned and dental records were required to ID the bodies.
The report says that Walker died from "combined effects of traumatic and thermal injuries," while Rodas suffered "multiple traumatic injuries." Both deaths were ruled accidents and toxicology reports are pending.
The two men had just left a charity event when the crash occurred. Investigators have ruled out rumors the two men may have been street racing at the time of the accident.
A law enforcement source told NBC News that the L.A. County Sheriff's Department's preliminary assessment is that the Porsche was traveling at approximately 40 to 45 miles per hour in a 45 mph zone and the driver apparently lost control while rounding a bend where the speed limit dropped to 15 mph.
The L.A. County Coroner's Office has completed the autopsies on Paul Walker and friend Roger Rodas, who died in a fiery car crash on Saturday.