Williams initially pleaded innocent, later changed his plea to guilty and has since tried to change it back, saying he was coerced to enter a plea.

Following a police corruption scandal in Tulsa, Williams' case and request to change his plea were brought back for hearings in May 2012.

At an evidentiary hearing, two alleged informants who were used in the federal investigation against Williams testified that they were coerced by Tulsa police officers to testify against Williams in 1997.

Williams maintained he had never met one of the informants who was alleged to have provided information to police.

Meanwhile, prosecutors at the evidentiary hearing worked to establish that investigators followed correct procedures in their 1997 investigation to show the original sentencing was appropriate.

Testimony also included previously unheard, inflammatory allegations against convicted Tulsa police officers, including an account of a plan to rob a police evidence van of drugs and money.

One of the informants in the case testified in Williams' 2012 hearing that he had worked for former Tulsa police officers John K. "J.J." Gray, Jeff Henderson, Harold R. Wells and former federal agent Brandon McFadden from 1995 to 1999 selling drugs.