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Dr. Nehemiah writes a research paper on the patterns found on human hands while looking through a microscope. He made note of ridges on the hands.
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Johann Christoph Andreas Mayer expands upon the paper by detailing how every person has their own ridge pattern.
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Jan Evangelist Purkyn discovers nine distinct fingerprint patterns.
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Sir William Herschel starts collecting fingerprints for the sake of studying them and discovered how patterns weren't altered by one's age.
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Alphonse Bertillon invents a new way to identify criminals based off the prior information.
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Alphonse Bertillon's method of identifying criminals is used for the first time to identify a criminal.
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Galton and Henry create the first fingerprint classification system which is still in use today.
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Ivan Vucetich began recording measurements on identification cards and introduced the idea of including all 10 fingerprint impressions. He also created his own fingerprint classification system.
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Sir Edmund Richard Henry devised groups for fingerprints based on pattern (e.g. whorl, arch, loop).
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A murder is solved using Alphonse Bertillon's fingerprint method for the first time.