William Marston
The idea for the polygraph test came from William Marston.
http://www.kenalder.com/liedetectors/portrait.htm
http://www.kenalder.com/liedetectors/portrait.htm
John Larson
The first polygraph was invented in the late 1920's by John Larson. The polygraph rose to instant fame when it was used in convicting William Hightower of murder.
http://www.kenalder.com/liedetectors/portrait.htm
http://www.kenalder.com/liedetectors/portrait.htm
On August 17, 1921 the San Francisco Call and Post instantly hailed the "lie detector" (as called by the press) and its national fame.
http://www.kenalder.com/liedetectors/larson.htm
http://www.kenalder.com/liedetectors/larson.htm
Chief August Vollmer
August Vollmer innovated interrogation techniques using the polygraph.
http://www.kenalder.com/liedetectors/portrait.htm
http://www.kenalder.com/liedetectors/portrait.htm
Leonarde Keeler
Leonarde Keeler innovated interrogation techniques using the polygraph, and he used a mechanical box that measured palm sweat and pulse rate.
http://www.kenalder.com/liedetectors/portrait.htm
http://www.kenalder.com/liedetectors/portrait.htm