The federal sentencing of former Prince George’s County executive Jack B. Johnson, who admitted he accepted bribes while in office, has been rescheduled from Sept. 15 to Dec. 6, according to online court records.

The brief notice of the change in the sentencing hearing date did not include any explanation. Changes in hearing dates for federal defendants are not unusual.

In May, after maintaining his innocence for six months, Johnson, 62, pleaded guilty in U.S. District Court in Greenbelt to two felonies: Extortion and conspiracy and witness and evidence tampering.

Johnson (D) admitted in court at the time that he accepted more than $400,000 in bribes during his eight years as county executive.

In June, his wife, Leslie, then a member of the County Council, pleaded guilty in federal court to one count of conspiracy to commit evidence and witness tampering. Leslie Johnson (D) resigned from her County Council seat in July.

The Johnsons were arrested as part of a sweeping federal investigation into political and police corruption in Prince George’s County. A former county housing official, three developers, a former high-ranking member of the fire department with ties to developers, the co-owners of a Langley Park liquor store and a handful of county police officers have pleaded guilty to various charges. The investigation is continuing, Maryland U.S. Attorney Rod J. Rosenstein has said.

Jack Johnson’s defense attorney, Billy Martin, did not immediately return a phone call.