Prosecutors to revoke Chris Brown's probation

"I plan on asking for sanctions from the DA's office for filing in frivolous, scurrilous and frankly defamatory motion," he said. A spokeswoman for the district attorney's office declined to comment on Geragos' statements.

Brown's time serving community service in Virginia has been under scrutiny for months, and Tuesday's motion asked a judge to order the singer to repeat his entire 180-day service sentence in Los Angeles. Brown had been given permission to perform cleanup and manual labor duties in Virginia, but LA prosecution investigators found no evidence that he completed his work as ordered.

Richmond, Va., Police Chief Bryan Norwood was supposed to be supervising Brown and submitted paperwork last year indicating the singer had completed his sentence. But prosecutors cite numerous shortcomings and possible misstatements in those records, which show the singer performing double shifts in the city and at a day care center where his mother once worked.

"This inquiry provided no credible, competent or verifiable evidence that defendant Brown performed his community labor as presented to this court," Deputy District Attorney Mary Murray wrote.

The records submitted by Norwood are "at best sloppy documentation and at worst fraudulent reporting".

Richmond police spokesman Gene Lepley declined to discuss the allegations.

"We believe it would inappropriate to comment on a matter that's before the court," Lepley said.

According to the motion, officials with Virginia's probation office told investigators that Brown's arrangement to be supervised by Norwood was "extremely unusual" and had not been approved by the agency. No one from Virginia's probation department oversaw Brown's hours, the filing states.

The motion notes that the only records the department has to indicate Brown was supervised were officers' overtime sheets. Five of 21 days that officers logged overtime for Brown were spent providing security for the singer's concerts.

One-third of Brown's hours were logged at a daycare center where the singer spent time as a child and where his mother once served as director, an analysis performed by The Associated Press in September showed.