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A Greek Physician created the first lie detector test.
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Chinese began to record thumb prints on clay sculpture and documents despite having no formal classification system was in place.
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A Roman attorney proved that blood-covered palm prints were left at a crime scene to frame a blind man for the murder of his mother.
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First documentation of medical knowledge aimed at solving crimes was recorded in the book "Hsi Duan Yu" (the Washing Away of Wrong). It detailed the process of distinguishing drowning from strangulation.
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Considered the father of modern toxicology, published "Traite des Poisons," and in the mid-1800s, investigators at Scotland Yard began to conduct bullet comparisons. Following these advancements, investigators developed successful tissue tests that identified arsenic as a means of murder.
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Forensic science expanded to include technologies like body temperature to determine time of death and the systematic use of fingerprinting for identification.
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The portable polygraph machine appeared
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Other critical discoveries of this time include voiceprint identification technologies, development of an acid phosphatase test for semen detection and early DNA analysis
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Tests to detect gunshot residue
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A doctor found out that out of 23 stab wounds only one was fatal.
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Using the solid foundation developed over thousands of years of forensic investigation, modern forensics built upon these technologies and expanded their application to include computer forensics, DNA forensics, entomological forensics and enhanced biological studies. Crime scene investigation continues to experience rapid technological advancements