Leonarde Keeler testing his lie-detector on a former witness for the prosecution at the trial of Richard Hauptmann in 1937
Born
(1903-10-30)October 30, 1903
North Berkeley, California
Died
September 20, 1949(1949-09-20) (aged 45)
Door County, Wisconsin
Alma mater
University of California, Berkeley University of California, Los Angeles
Occupation(s)
Detective, inventor
Known for
Co-inventor of the polygraph
Spouse
Katherine Applegate
(m. 1930; died 1944)
Leonarde Keeler (October 30, 1903 – September 20, 1949) was the co-inventor of the polygraph. He was named after the polymath Leonardo da Vinci, and preferred to be called Nard. He was a Berkeley high school student and amateur magician. He was captivated by John Augustus Larson's machine, a "cardio-pneumo psychogram", with the goal of detecting deception, and worked on it to produce the modern polygraph.[1]
^Alder, K (2007). The Lie Detectors: The History of an American Obsession. Free Press, Simon and Schuster, Inc. ISBN 0-7432-5988-2
LeonardeKeeler (October 30, 1903 – September 20, 1949) was the co-inventor of the polygraph. He was named after the polymath Leonardo da Vinci, and preferred...
Connecticut from Norwalk in 1698 Ken Keeler, American comic writer LeonardeKeeler, inventor of the polygraph Ralph Keeler (1613–1672), founding settler of...
August Vollmer. Further work on this device was done by LeonardeKeeler. As Larson's protege, Keeler updated the device by making it portable and added the...
polygraph machine tests. Both tests were administered by polygraph expert LeonardeKeeler, who told Ness that Sweeney was the culprit. Ness apparently felt there...
Zaleska (based on real-life convict Theodore Marcinkiewicz) (uncredited) LeonardeKeeler as himself, the actual inventor of the Polygraph (uncredited) E. G...
The Export-Import Bank of the United States is incorporated. 1935 – LeonardeKeeler administers polygraph tests to two murder suspects, the first time...
Augustus Keeler (October 7, 1871 – July 31, 1937) was an American author, poet, ornithologist and advocate for the arts, particularly architecture. Keeler was...
"Detecting Deception". Observer. 15 (6). Retrieved 26 April 2012. Keeler, Leonarde (January 1930). "A Method for Detecting Deception". American Journal...
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