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The first case ever recorded that used forensic evidence. After a knife was used to stab somebody, authorities collected all the knives in the village and waited for flies to be attracted to the blood residue on the knife, which lead to the suspect confessing.
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The chemist who published the first scientific paper on detection of poisons and the effects they had on humans, also knows as the "Father of Forensic Toxicology"
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The first to use thumbprints on documents to identify workers in India.
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He is the "Father of Criminal Identification". he developed the science that uses body measurements to identify people, known as anthropometry.
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He used fingerprints to remove an innocent man from a burglary suspect list.
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He published the first detective story, popularly know as Sherlock Holmes. Sherlock Holmes was the first "CSI" featured in the 4 novels, 56 short stories, with his popular scientific crime-detection methods.
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He conducted the first definitive study of fingerprints and their classification and showed proof of how each fingerprint is unique and there is no exact copy.
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He wrote the first paper that explained the application of to the field of criminal investigations.
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He discovered ABO blood groups.
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He incorporated Hans Gross' principles within a workable crime lab
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He developed the fundamental principle document examination and published Question Documents.
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He developed a method for blood-typing from dried blood.
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He established the first crime lab in the United States.
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He created a comparison microscope and used it to see if bullets were fired from the same weapon.