After being charged with violent behavior over his girlfriend, Rihanna, the singer Chris Brown is now sued again. This time it is one photographer's turn to claim that Brown involved him in a violent incident in March. According to Usmagazine.com, Robert Rosen is suing Brown and the L.A. Fitness gym for assault, battery, intentional infliction of emotional distress and false imprisonment.It seems that, while Brown was playing basketball at