UPDATED: Driver Roger Rodas lost control "for unknown reasons" before the fatal Nov. 30 accident in Santa Clarita, according to the final report.

The Porsche Carrera GT in which Paul Walker was a passenger was traveling faster than 100 mph when the car's driver lost control and crashed, according to the final coroner's report from the L.A. County Coroner's Office issued Friday.

According to an L.A. Sheriff's Department investigation of the crash, the red sports car, driven by Roger Rodas, was headed east on Hercules Street "at an unsafe speed, approximately 100+ mph," when Rodas lost control "for unknown reasons" and the car partially spun, hitting a curb, a tree and a light post. That impact spun the car around another 180 degrees, causing the passenger side of the car to hit another tree and burst into flames.


The fiery crash scattered debris across all four lanes of the Santa Clarita parkway as well as a nearby parking lot.

There was no sign of alcohol or drugs in the system of the car's driver, Rodas, 38, who died of "multiple traumatic injuries," according to the coroner's toxicology reports.

The Fast & Furious actor, 40, died of traumatic and thermal injuries; there was no sign of alcohol or drugs in his system, the report notes. The coroner checked for cocaine, marijuana, methamphetamine and other substances in Walker's body and the results were negative across the board.

Rodas and Walker had taken the vehicle for a drive on Nov. 30 shortly after an event held by the actor's charitable organization, Reach Out WorldWide. Shortly after 3:30 pm, L.A. County firefighters arrived at the scene of the crash and determined the driver and passenger's death, the report states.

Traces of soot collected in Walker's trachea suggest that he was briefly alive in the seconds after the crash

Porsche Sued Over Crash That Killed Paul Walker

The widow of the man who was driving a Porsche sports car that crashed and killed actor Paul Walker sued the automaker on Monday, claiming design flaws caused both men to die in a fiery crash in November.

The wrongful death lawsuit by Kristine M. Rodas says her husband was driving at 55 mph -- not at unsafe speeds as law enforcement investigators determined -- before it crashed last year.

Roger W. Rodas was driving a 2005 Porsche Carrera GT capable of more than 200 mph, but his wife's lawsuit says the vehicle lacked a proper crash cage and safety features in the gas tank that would have saved both men's lives.

The lawsuit also contends that a failure in the car's suspension system forced it to careen out of control and strike three trees while driving down a street in Santa Clarita.

"The Carrera GT was unsafe for its intended use by reason of defects in its manufacture, design, testing, component and constituents, so that it would not safely serve its purpose," the lawsuit states.

The lawsuit seeks unspecified damages from Porsche Cars North America, which did not immediately return email messages seeking comment.

Kristine Rodas' attorney, Mark Geragos, said he hired the top experts in the country to evaluate the wreckage and crash. The results, he said, were an unbiased look at the accident that refutes an official investigation that determined the sports car was speeding at up to 94 mph when it crashed.

The results of an investigation by the Los Angeles County Sheriff's Department and California Highway Patrol was released in March and concluded that it was unsafe speed and not mechanical problems that caused the crash. That investigation was aided by engineers from Porsche, who evaluated the wreckage of the rare car.

The differing opinions on the crash will likely be a part of any trial over the lawsuit, which could take years to resolve.

Roger Rodas was trained as a race car driver, according to his wife's lawsuit. He left behind two young children upon his death.

Walker, the star of the "Fast & Furious" film franchise, co-owned an auto racing team with Rodas named Always Evolving.

Walker's death occurred on a break in the filming of "Fast & Furious 7," and the actor's two brothers are helping complete action scenes in the film. The film's release has been delayed until April 2015.