The 40-year-old and his friend Roger Rodas were killed in a car crash on November 30 when their Porsche Carrera GT slammed into a pole and caught fire.
Autopsy results reveal that Walker and Rodas, who witnesses say was driving the vehicle that crashed and killed both men, died from multiple traumatic injuries, reported People magazine quoting the autopsy report conducted by the Los Angeles County Department of Medical Examiner-Coroner.
Both deaths were ruled accidents. A toxicology analysis is still pending and could take weeks to complete.