Chris Brown has checked into anger-management rehab in Malibu, California. His on-again, off-again girlfriend Karrueche Trandropped dropped him of and gave him a kiss goodbye on Tuesday as employees of the facility escorted Breezy inside. Hour prior, the troubled singer met with officials of the L.A. County Probation Department who are investigating his most recent assault charges. Brown allegedly attacked a fan outside a hotel Sunday in Washington, D.C., leaving the man with a fractured nasal bone. Brown was arrested for felony assault, pleaded not guilty and was released on Monday. Brown faces four years in prison if it’s determined that he violated his probation in the Rihanna assault case.