Federal prosecutors asked U.S. District Judge Sara Lioi to grant a motion on Friday pushing Frank Russo's prison report date back until February 29, 2012.
Russo is set to report to prison June 30.
Prosecutors pushing for the delay so Russo can testify against former commissioner Jimmy Dimora, whose trial date has been scheduled for January 4, 2012, and others involved in the County Corruption investigation.
Prosecutors argued that delaying Russo's prison report date will save significant government resources.
Judge Lioi has not made a ruling on the request, but defense attorneys have not objected.