WASHINGTON (AP) — A judge has agreed not to set a sentencing date for a former campaign aide to District of Columbia Mayor Vincent Gray.

Thomas Gore was the acting treasurer for Gray’s 2010 campaign against then-mayor Adrian Fenty. He pleaded guilty to making secret payments to another candidate and shredding records of the transactions. That candidate, Sulaimon Brown, was paid to stay in the race and make negative comments about Fenty.

Gore is one of three Gray campaign aides who have pleaded guilty to felonies. During a court appearance Wednesday, prosecutors asked a judge not to set a sentencing date because their investigation remains active and Gore is cooperating, which could lead to his sentence being reduced.

Gore’s attorney, Frederick Cooke, says he’s frustrated by the delays because his client needs closure.

(Copyright 2012 by The Associated Press. All Rights Reserved.)