English: Alphonse Bertillon, the chief of criminal identification for the Paris police department, developed the mug shot format and other photographic procedures used by police to register criminals. Although the images in this extraordinary album of forensic photographs were made by or under the direction of Bertillon, it was probably assembled by a private investigator or secretary who worked at the Paris prefecture. Photographs of the pale bodies of murder victims are assembled with views of the rooms where the murders took place, close-ups of objects that served as clues, and mug shots of criminals and suspects. Made as part of an archive rather than as art, these post-mortem portraits, recorded in the deadpan style of a police report, nonetheless retain an unsettling potency.