Accident forensics deals with systematic process of investigating, analyzing and drawing conclusion scientifically about the events and factors that lead to a vehicular collision. An accident investigation typically starts with the inspection of the crash scene and also includes inspection of the vehicle and reconstruction of the accident. Accident forensics uses the principles and process of Physics to determine the cause of accident, speed of vehicle, impact direction, etc. and this can be done only by experts who are experienced and specialized to evaluate these factors and evidence using scientific methods and principles. Accident forensics usually required for insurance companies to pay the claims and for law enforcement to determine if the accident was intentional or otherwise and to establish the role of each vehicle contributing to the accident.