Through a real practical situation of the work of the police, confronted with the robbery of a banking institution, enter the skin of our investigator, sent to the scene of the crime. Search with him, thanks to the clues left on site, which tools of the technical and scientific police and which brigades of the prefecture of Police will be able to be solicited to solve the investigation. An opportunity to discover or rediscover the latest scientific police practices and advances used by the police in the resolution of a criminal case involving the use of firearms.