Criminalistic experiment is a method of forensic practical activities consisting in developing and experimental investigation of forensically relevant events, activities and events in fragments created artificially and deliberately altered conditions in order to identify and prove the facts of the case. This method is often repeated story, physical situation that could occur. The paper presents the possibilities of computer modeling in investigating crimes. Prospective Method program is Vitrual Crash 3. This is a certified software, which was developed for forensic engineering and biomechanical applications. With this method it is possible to simulate situations that can not be practically implemented a real experiment with a dummy or a live person. The paper gives a concrete example in practice.