According to an investigation by The Guardian, Richard Zuley, a detective on Chicago’s north side from 1977 to 2007 and who interrogated terrorism detainees at Guantanamo Bay, imported the type of harsh tactics used at America's holding center for terrorism suspects into his work as a police officer. The newspaper's Spencer Ackerman reports that Zuley allegedly "repeatedly engaged in methods of interrogation resulting in at least one wrongful conviction and subsequent cases more recently thrown into doubt following allegations of abuse." The Guardian alleges that Gitmo detainee Mohamedou Ould Slahi and domestic defendants "confessed untruthfully to try and stop the treatment by Zuley."