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The Chinese began using thumb prints on documents and clay sculptures
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A Greek physician named Erasistratus developed the first lie detector test
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A Roman attorney was able to prove that bloody palm prints were left on purpose to frame a man for murder
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The first book about using medical knowledge to solve crimes was written. It told how to determine if a person was a victim of drowning or if they had been strangled.
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A Swedish chemist figured out how to identify arsenic in corpses
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Scotland Yard police began comparing bullets. These were the first ballistics tests
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Scientists began using body temperature to determine time of death
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New York prisons began using fingerprinting
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The first portable polygraph machine was created
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The FBI began using psychological profiling
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DNA typing was developed
