Larson, John A. (John Augustus), b. 1892.
In 1921 John A. Larson, a young medical student at the University of California Berkeley, assembled the first American polygraph lie detector for Berkely Chief of Police, August Vollmer. Larson went on to specialize in criminal psychology working with police departments and mental hospitals in Indiana, Illinois, Michigan, Iowa, New Mexico, and South Dakota.From the finding aid for John A. Larson Papers, 1922-1965 (Bancroft Library.)