Cassio, a drunk?

Earlier I commented on a new lieutenant who seemed to have such promise. Unfortunately, I just discovered his demotion under general Othello. All I know is Micheal was supposedly drunk and started a brawl. He just does not seem like a careless individual. Are all my taste in men askew? Surely it was just a misunderstanding and he still is in some kind of office. Oh well, but my eyes are still set on him.