Polygraph Expert Shows How to Beat a Lie Detector Test

Polygraph Expert Shows How to Beat a Lie Detector Test

https://youtube.com/watch?v=N3fHkCFxgQQDoug Williams is a former Oklahoma City detective sergeant. As an officer in the department's internal affairs and polygraph unit, he conducted thousands of polygraph tests. In the late 1970s, however, Williams began to doubt that the so-called lie...

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