Even if you think you may have played a role in causing the car accident, do not say so. Do not admit fault to anybody at the scene of the crash or anybody else in the days or weeks that follow. It is up to the police officers and insurance carriers to investigate the collision to determine what happened. In the immediate aftermath of a crash, you may not even realize that the actions of other parties played a role in causing the collision. The good news is that California operates under a modified comparative negligence system. This means that even those at fault for collision (up to 99% at fault) can still recover compensation for their losses, though the total compensation they receive will be reduced based on their percentage of fault.