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Fingerprints are first used to identify identity of people
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William Nichol created the polarizing light microscope.
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James Marsh, an English chemist, uses chemical processes to determine arsenic as the cause of death in a murder trial.
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Pictures are used in a trial in San Francisco as evidence.
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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.
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American President Theodore Roosevelt established Federal Bureau of Investigation (FBI).
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First crime lab built in Los Angeles.
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Prototype polygraph, which was invented by John Larson in 1921, developed for use in police stations.
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R. F. Borkenstein, captain of the Indiana State Police, invented the Breathalyzer for field sobriety testing.
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The fourier transform infrared spectrophotometer (FTIR) is adapted for use in the forensic laboratory.