Doug Williams pleads guilty to running Polygraph.com - Business Insider Doug Williams pleads guilty to running Polygraph.com - Business Insider Posted: 18 May 2015 12:00 AM PDT Doug Williams. The Way Back Machine A former Oklahoma police officer pleaded guilty on Thursday to obstruction of justice and mail fraud for teaching people how to pass lie-detector tests — even if they're lying, according to the Department of Justice . Douglas Williams, 69, owned and operated Polygraph.com, a now defunct website that offered training to conceal information during lie-detector tests, also known as polygraphs. Many of Williams' customers were required to undergo the tests for background checks, as part of federal investigations, and under the terms of their parole and/or probation, according to the indictment . Williams touted his services on his website, per a January 20, 2013, cached version available on the Way Back Machine, ...