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Photos are used as identification for the first time
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Fingerprints are beginning to be used in crime cases
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First forensic science school is opened
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Hair is beginning to be used in crime cases
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Guns are discovered to be unique from the markings in the barrel
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Lie detector test was created
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Voice recordings began to be used in criminal cases
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National crime information center created
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National academy of sciences certifies DNA
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Japanese create a dental x-ray system that can match dental x-rays to people in less than four seconds