Does Singer Chris Brown Still Have Some Explaining to Do on 2009 Assault?

Ever since pleading guilty to felony assault on ex-girlfriend Rihanna, singer Chris Brown has been faced with some serious image repair work. He may have taken a step backward today, when an appearance on "Good Morning America" ended with a shaken staff, a shirtless Brown and a pane of shattered glass. Does Brown still have some explaining to do on the 2009 assault?