The crime scene usually includes line of approach, point of entry, the actual scene, the point of exit and the line of departure. The scene of crime may be classified as outdoor or indoor scene. A crime committed on a road or a field is an outdoor crime. Whereas a crime committed in a house, a car, etc., is an indoor crime. There may be certain types of crime which have no ‘scene’ at all. The crime of this nature are forgery, embezzlement etc. The crime of indoor and outdoor nature like theft, house breaking, robbery, dacoits, traffic accident etc., have invariably physical evidence at their scenes because of intense physical activities involved in their commission. Physical evidence found at the crime scene can be the key to the solution of a crime.