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Archaeologists discovered fingerprints pressed into clay tablet contracts in Babylon. -
wrote a paper describing the patterns that he saw on human hands under the microscope, including the presence of ridges. -
Described that "the arrangement of the skin ridges is never duplicated in two persons." -
Described nine distinct fingerprint patterns, including loops, spirals, circles, and double whorls. -
Began the collecting of fingerprints. He notes the patterns were unique to each person and were not altered by age. -
An assistant clerk in the records office at the Police Station in Paris created a way to identify criminals. The system, sometimes called Bertillonage, was the first to be used in 1883 to identify a repeating offender. -
Along with Sir E. R. Henry, they developed the classification system for fingerprints that is still in use today in the United States and Europe. -
He improved the fingerprint collection process. He began to note the measurements on the identification cards of all arrested persons, as well as adding all 10 fingerprint impressions. He devised his own fingerprint classification system and invented a better way of collecting impressions. -
Created a system that divided fingerprint records into groups based on whether they have an arch, whorl, or loop pattern. -
He was also credited with solving the first murder using fingerprints