Absolutely freaking awesome! I hope it is true.
And what's that guy gonna do, go to the police and explain that he was robbed while trying to mug someone? I don't think so. He'd get laughed out of the station. When I was a police officer I had some guy try and bring charges against another guy for criminal activity against him while he was in the process of criminal activity himself. Once I explained to him that he was incriminating himself and he would be charged as well, he of course wanted to forget the whole thing. Criminals never cease to amaze me with their stupidity. This is what America needs, people who stand up and protect themselves and will step forward to protect those around them that are unable to protect themselves.