Police crime scene scanner. Police officer using a laser scanner (not seen) to record a crime scene with millimetre precision. The laser scans the room recording the position of every object such as blood stains of the walls, which can then be used to ascertain the angle of trajectory of a bullet. Here, he is holding up a target card on the wall as a reference point for the scanner. Photographed at the Institut de recherche criminelle de la gendarmerie nationale (IRCGN), the forensic science department of the French National Gendarmerie, France.