A former Oklahoma City law enforcement officer and the owner of Polygraph.com has been sentenced to two years in prison for training customers to lie and conceal crimes and other misconduct during polygraph examinations.

Assistant Attorney General Leslie R. Caldwell of the Justice Department’s Criminal Division, Assistant Commissioner Matthew Klein of U.S. Customs and Border Protection’s Office of Internal Affairs and Special Agent in Charge Scott L. Cruse of the FBI’s Oklahoma City Division made the announcement.

Douglas G. Williams, 69, of Norman, Oklahoma, pleaded guilty on May 13, 2015, to two counts of mail fraud and three counts of witness tampering. Chief U.S. District Judge Vicki Miles-LaGrange of the Western District of Oklahoma imposed the sentence.

According to admissions made in connection with his plea, Williams owned and operated Polygraph.com, an Internet-based business through which he trained people how to conceal misconduct and other disqualifying information when submitting to polygraph examinations in connection with federal employment suitability assessments, background investigations, internal agency investigations and other proceedings. In particular, Williams admitted that he trained an individual posing as a federal law enforcement officer to lie and conceal involvement in criminal activity from an internal agency investigation. Williams also admitted to training a second individual, posing as an applicant seeking federal employment, to lie and conceal crimes in a pre-employment polygraph examination. Williams also admitted to instructing the individuals to deny receiving his polygraph training.

The investigation was conducted by U.S. Customs and Border Protection’s Office of Internal Affairs and the FBI’s Oklahoma City Division. The case was prosecuted by Trial Attorneys Heidi Boutros Gesch and Brian K. Kidd of the Criminal Division’s Public Integrity Section.