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bullet comparisons
In scotland yard -
Period: to
CSI
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Mathieu Bonaventure Orfila, who is considered the father of modern toxicology, published "Traite des Poisons"
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tissue samples
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Period: to
CSI techniques in 1800's
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Body tempuature
Using a person body temp. to find out when they died -
fingerprinting
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gunshot residue