Thanks to LA's high concentration of paparazzi there's video of (allegedly) him blowing through a red light moments before the crash: https://www.youtube.com/watch?v=gNhqKRugk8Q as well as video of the burning wreck minutes later: https://www.youtube.com/watch?v=3LSY3wVuASg (possibly disturbing video)

Also, interview with an eyewitness: https://www.youtube.com/watch?v=fweyFCFKcp0