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Meet the ex-cop battling polygraph testing

One of the most vocal critics of the polygraph test in the US will be on trial next week, facing federal charges including obstruction of justice for allegedly coaching people how to pass the polygraph test. But Doug Williams says his books and DVDs simpl
One of the most vocal critics of the polygraph test in the US will be on trial next week, facing federal charges including obstruction of justice for allegedly coaching people how to pass the polygraph test. But Doug Williams says his books and DVDs simpl 8:52