Alex Landau grins and waves at the thirty people seated in a circle around him at the Hiawatha Davis Community Center in Park Hill. He lives in this neighborhood and knew many of them even before his bloody face made the news. "My name is Alex Landau, and I'm going to teach you some tips and phrases to use with law enforcement, if you're ever in a situation where you need them," he says. "Let's hope you're not. A couple years ago, I could have used some of these."