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          John Augustus Larson

          American police officer and inventor (1892–1965)

          John Augustus Larson

          John Larson in 1921

          Born(1892-12-11)December 11, 1892

          Shelburne, Nova Scotia, Canada

          DiedOctober 1, 1965(1965-10-01) (aged 72)

          Nashville, Tennessee

          NationalityAmerican
          CitizenshipU.S.
          EducationBoston University (M.Sc., 1915)
          University of California, Berkeley (Ph.D., 1920) Rush Medical College (M.D.)
          Alma materUniversity of California, Berkeley, Rush Medical College
          Occupation(s)Police Officer, Forensic Psychiatrist
          Known forCriminology, Polygraphy
          Scientific career
          FieldsMedicine
          Criminology
          InstitutionsBerkeley Police Department

          John Augustus Larson (11 December 1892 – 1 October 1965) was a police officer and forensic psychiatrist and became famous for his invention of the modern polygraph device used in forensic investigations.[1] He was the first American police officer with an academi