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juan Vucetich, an Argentinean police officer, is the first to use fingerprints as evidence in a murder investigation. He created a system of fingerprint identification, which he termed dactyloscopy.
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Human blood grouping, ABO, discovered by Karl Landsteiner and adapted for use on bloodstains by Dieter Max Richter.
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NY state prison system implemented fingerprint identification.
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Victor Balthazard and Marcelle Lambert publish first study on hair, including microscopic studies from most animals. First legal case ever involving hair also took place following this study
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Victor Balthazard realizes that tools used to make gun barrels never leave the same markings, and individual gun barrels leave identifying grooves on each bullet fired through it. He developed several methods of matching bullets to guns via photography.
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Prototype polygraph, which was invented by John Larson in 1921, developed for use in police stations.
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A sound spectrograph discovered to be able to record voices. Voiceprints began to be used in investigations and as court evidence from recordings of phones, answering machines, or tape recorders.
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Tommy Lee Andrews convicted of a series of sexual assaults, using DNA profiling.
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FBI establishes the integrated automated fingerprint identification system, cutting down fingerprint inquiry response from two weeks to two hours.
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A way for scientists to visualize fingerprints even after the print has been removed is developed, relating to how fingerprints can corrode metal surfaces.
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Michigan state university develops software that automatically matches hand-drawn facial sketches to mug shots stored in databases.
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Britain's Forensic Science Service develops online footwear coding and detection system. This helps police to identify footwear marks quickly.
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