On the heels of the BB (Britney Breakdown), Kevin Federline's lawyer Mark Vincent Kaplan is heading to court this morning in an attempt to take away Britney's visitation rights with Sean Preston and Jayden James. Attorney Tara Scott from the law firm of Trope and Trope will represent a hospitalized Brit, even though the firm has asked to withdraw as counsel. Mark's probably not going to have to work too hard at making that happen, as more details emerge on last night's events. People.com says that the pop wreck locked herself in a room with Jayden and refused to hand him over to Kevin, and that it was the court-appointed montior that called the police. "She had already put Preston in the car when Britney locked herself in a room with Jayden," says the source. "The cops came and got through the door and tied her down to a gurney." Britney remains in a 72-hour lockdown for mental evaluation.