20th century forensic upgrades

  • 1921

    While still a medical student at the University of California, John Larson invents the modern lie detector, also known as the polygraph.
  • 1923

    The first dedicated crime laboratory in a police department is implemented in Los Angeles.
  • 1948

    Founding of the American Academy of Forensic Sciences (AAFS).
  • 1996

    The National Academy of Sciences declare that there is no reason to doubt the conclusions of DNA evidence.

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