Officials believe speed was a factor in the fiery crash that killed actor Paul Walker, though it will take time to determine how fast the car was going.
Paul Walker died in the one-car accident in California Saturday at age 40.
Sheriff's deputy Peter Gomez said investigators are working to determine how fast the car was traveling and what caused it to go out of control.
Among the many unanswered questions? Whether the driver, Walker's friend, was distracted or something in the road prompted him to swerve.
After the Porsche crashed into a light pole and tree, it burst into flames, killing its occupants. The downed light pole had a speed limit sign of 45 mph.
The crash also killed Walker's friend and financial adviser Roger Rodas, according to Walker's publicist, Ame Van Iden, who confirmed the tragedy.
She said that Walker was a passenger in the 2005 red Porsche Carrera GT when they drove away from a fundraiser in the community of Valencia.
Deputies found the car engulfed in flames when they arrived. Officials have not identified either person found in the car, as they are unrecognizable.
Dental records will be needed to formally identify the bodies.
A statement said that Paul was a passenger in the car, and had been at a charity event for his organization, Reach Out Worldwide earlier in the day.
Walker and Rodas held the event to benefit victims of the recent Philippines typhoon. Walker founded the charity in 2010 to aid victims of natural disasters.
On Sunday, fans of the actor gathered to leave flowers, candles and memorabilia from the Fast and Furious action movies for which he is best known.
Walker is "gone but he'll never be forgotten because there are so many people that look up to him," Joel Perez, 23, told the Los Angeles Times.
Production on Walker's upcoming film Fast & Furious 7 is delayed for obvious reasons following the tragedy, and its future sans Paul is far from clear.