if you dont hv an in-carvideo, at least get yourself a camera. ask the farker not to move his vehicle if he is at fault. snap pics on the spot from all the angles. remember to include lane marking, car number and land marks on your pictures. if the farker try to move his vehicle after accident, you tell him you are injured and he is NOT ALLOWED to swift the accident vehicle.
howgood is ain-car video mentioned by BN? check the following...