Chris Brown's ex-girlfriend Karrueche Tran alleged that the rapper previously assaulted and threatened to kill her, according to reports. Tran filed a restraining order against Brown, citing that Brown had previously punched her and even pushed her down the stairs, TMZ reported. According to court documents, Tran claimed that Brown allegedly threatened to kill her only a few weeks ago. The assault, however, would have happened around the time Brown was on probation for assaulting Rihanna. "Around the second week of February, he told a few people that he was going to kill me...He said if no one else can have me, then he's gonna 'take me out,'" Tran told the court.