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Finger prints found on documents and clay statues
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"Hsi Duan Yu" a book about the differences of drowning and strangulation and blood imprints used to solve a case
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Where finger prints start to be fully used in investigations, identifying poisons as murder tool, and analyzing bullets to find killer.
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Hair, blood, finger prints and any biological evidence is now use to trace killers
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Everything from past century such as finger prints, DNA, bullet analysis, and even tacking you electronically with your computers and phones.