Alphonse Bertillon
French photographer, Alphonse Bertillon was the first to realize that photographs were futile for identification if they were not standardized by using the same lighting, scale and angles. He wanted to replace traditional photographic documentation of criminals with a system that would guarantee reliable identification. He suggested anthropological studies of profiles and full-face shots to identify criminals. He published La Photographie Judiciaire (1890), which contained rules for a scientifically exact form of identification photography. He stated that the subjects should be well lit, photographed full face and also in profile, with the ear visible. Bertillon maintained that the precepts of commercial portraits should be forgotten in this type of photography. By the turn of the century, both his measurement system and photographic rules had been accepted and introduced in almost all states. Thus, Bertillon is credited with the invention of the mug shot.
Some people believe that Bertillon's methods were influenced by crude Darwinian ideas and attempted to confirm assumptions that criminals were physically distinguishable from law-abiding citizens. It is speculated in the article, "Most Wanted Photography," that it is from this system that many of the stereotype looks (skin color, eye color, hair color, body type and more) of criminals in movies, books and comics were founded. Although the measurement system was soon replaced by fingerprinting, the method of standardized photographs survived.
Read more about this topic: History Of Forensic Photography