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CHIn the early 1900s, at the United States Penitentiary in Leavenworth, a case involving two inmates named Will West and William West exposed serious weaknesses in the prison identification system of the time.
At that period, prisons relied on a method called anthropometry, also known as the Bertillon system. It identified individuals using physical measurements such as head size, arm length, and other body proportions. It was considered advanced for its time, but it was not foolproof.
When Will West arrived at Leavenworth, clerks attempted to file his records. However, they found that an inmate already in the system — William West — had a very similar name and nearly identical physical measurements under the Bertillon system.
Despite this resemblance, the two men were not the same person. They were separate individuals who happened to share similar physical traits and names, which created confusion in the prison’s records and slowed down identification procedures.
This incident, along with other limitations of anthropometry, contributed to growing interest in more accurate methods of identification. Around the same period, fingerprint classification systems were being developed and tested more widely in law enforcement.
Fingerprints offered something anthropometry could not — true uniqueness and permanence.
Over time, fingerprinting replaced older systems like Bertillonage and became the global standard for criminal identification.
The Leavenworth case remains historically important not because of a dramatic “double identity,” but because it helped expose why a more reliable system was urgently needed.
@chronologee
