Polygraph Expert Shows How to Beat a Lie Detector Test

Doug 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 detector actually is such a thing, and within a decade he had evolved into one of the most vocal, visible, and theatrical critics of the polygraph. Williams shows Bloomberg exactly how simple it is to manipulate, and beat, the lie detector test. (Video by Jennafer Savino and Justin Beach) (Source: Bloomberg)

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23 thoughts on “Polygraph Expert Shows How to Beat a Lie Detector Test”

  1. Fred Seaborne says:

    2:22 LOL I love his "the more of an old thief you are" expression 😛 😀

  2. Kelly Day says:

    I think this guy is full of sh*t. He claims to believe that polygraphs are inaccurate. Well first of all,when he was an examiner in the early 70s, the machines would not have been as accurate as they are now. And 2,they are also trying to imprison him for counts of mail fraud,which is obviously nothing to do with teaching people to cheat the polygraph,and he plead guilty. I think hes a criminal

  3. Mano says:

    Its because the ridiculous authorities want to use it against the population they want to control.

  4. NefFy says:

    The government is just mad because you’re taking away one of its interrogation techniques that works very well or are you least used to until people realize it didn’t work. It’s like a placebo. And if people know they are just taking a placebo it’s not going to affect them because they already know. I don’t think anyone should ever get convicted based on a polygraph test which is why they can’t be used in court but if it is used to extract evidence from someone who is guilty because they think they will get caught lying I don’t see anything wrong with that. There’s a lot of corrupt things at the police do but using a lie to scare someone into telling the truth doesn’t really bother me as long as they are getting the truth

  5. NefFy says:

    The fact that they are trying to send this guy to jail and find him for putting it out there is ridiculous. I see that they wouldn’t want it out there is public knowledge because then they can’t use it but to ruin this guys life for putting the truth out there is a crazy AND hypocritical

  6. Crazy Horror Chick says:

    Why would someone post this for all the rapists and child molesters to see! I hope it don’t work….

  7. Manuel Cedillo says:

    Jenny Perez, virgo411#.

  8. Brendan Gaynor says:

    They want to put him in prison because if people know this then the cops can’t use these tests to intimidate suspects into giving a confession. So therefore the police departments mad that this guy is destroying there scarecrow for suspects.

  9. Brandie Regan says:

    Yes if they worked then y not fire all judges prosecutors and lawyers and just use polygraph test ol that's right they no polygraph test are a joke

  10. Karma's Pimp says:

    was the smell of fear a joke, or does this guy have a superhero sense of smell?

  11. Khush Jain says:

    Me looking up this a day before my polygraph test
    Anyone same hit like

  12. martin franklin says:

    I love this guy the should give him a reward

  13. Vidushi says:


    Youtubers: TAKE NOTES!! TAKE NOTES!!!

  14. Donna Kolodziejski says:

    Show me a certain animal and FEAR!!PHOBIA!!

  15. Ikito says:

    oh he died this year on march the 19th :/

  16. anime says:

    Imagine how many people have been wronged because of this false apparatus

  17. SeaSasquatch says:

    RIP Doug Williams

  18. Ray文哥 says:

    If only chris watts saw this before he took the polygram exam

  19. Jennifer Marie Herron says:

    Hintenberg: odds n' evens in a family pack of Double Stuf OREO (™)

  20. werewolfmanjackal says:


  21. Prettyboydrippy says:

    Any new comments here?

  22. Mike C. says:

    Am I the only one that thinks his explanation (and then the immediate following video clip) is reversed, when he is showing the examples of the “controlled” & “relevant” questions.

    When he describes what a “controlled” question is (then the immediate following club is of a “relevant” question. (& vice versa)

    For example; at 3:38
    “is your first name Jenna?”
    is a “control” question, not a “relevant” question.

  23. Bike Builder says:

    I always used the George Costanza method. ""its not a lie if you believe it"""

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