LOS ANGELES -

Chris Brown returns to court Wednesday to face a judge who will determine how much credence to give prosecutors' allegations that the R&B singer has failed to complete his community labor sentence.

Prosecutors filed a motion on Tuesday asking Superior Court Judge James Brandlin to revoke Brown's probation for the 2009 beating of Rihanna. They cite inconsistent and possibly falsified records of Brown's community service in Virginia and other incidents they say demonstrate that the Grammy winner has anger issues.

Brown's attorney Mark Geragos calls the filing scurrilous and defamatory.

Deputy District Attorney Mary Murray says there is no credible evidence Brown performed the hours as planned. Her filing claims Brown was essentially unsupervised in Virginia and should be punished for a recent fight with singer Frank Ocean.