According to Los Angeles County Sheriff's Office, speed was a factor in the car crash: a 45 mph speed limit sign was attached to the light pole knocked down by the Porsche.
According to a report by CNN.com the Porche, which sold for $450,000 when new, is a notoriously difficult vehicle to handle, even for professional drivers. According to a report in Autoweek magazine, a top driver called it "scary." The vehicle is powered by a V-10, 610-hp engine.
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Police are investigating tire skid marks on the asphalt near the crash site, which indicate a car was doing doughnut spins. However, it has not been concluded that the skid marks are related to the Walker crash. Hercules Street, where the car accident took place, has a reputation for fast drivers, which prompted a police crackdown earlier.
Roger Rodas, who was believed to be driving the Porche at the time of the crash, also died. Hercules Street, a wide business park road, is in the community of Valencia inside the city of Santa Clarita, about 30 miles north of Hollywood, according to Walker's publicist and CNN affiliate KCAL.