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In 1200's China, somebody in a village was stabbed. The villagers collected every knife in the village, and set them out. Later, flies were attracted to the traces of blood on one of the knives. The owner of the knife then confessed to the murder.
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The Father of Toxicology. He discovered ways of detecting poisons on bodies by testing different toxins on animals.
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As an officer for the British Indian Civil Service, he began to use fingerprints to identify workers. This is one of the earliest cases of fingerprints being used to identify people.
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The Father of Criminal Identification. He developed Anthropometry, which uses body measurements to identify individuals.
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He used fingerprints to eliminate an innocent burglary suspect. This is an early example of fingerprints being used in a forensic setting.
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The author of the immensely famous "Sherlock Holmes" stories. These popularized scientific crime-detection methods in forensics.
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Published "Finger Prints", which was the first definitive study into the science of fingerprints. He gave proof of their uniqueness, and how to classify them.
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Wrote "Criminal Investigation". He wrote the first paper describing how to apply scientific principles to forensics. Kinda had a half mustache.
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He discovered the ABO blood groups, for which he received a Nobel Prize.
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He incorporated Gross' principles within the real world. He founded the Institute of Criminalistics in Lyons, France.
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Published "Questioned Documents". He developed the fundamental principles of document examination. His work led to the eventual creation of Document Examination Units.
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He developed a method to find out the blood type of dried blood. This was useful in solving crimes that were not discovered immediately.
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He founded and headed the first crime lab in the United States, which was located in Los Angeles.
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He created the comparison microscope, which was originally used to compare bullets. It can also be used to compare hair samples.