Friday's sentencing came after Conrad Alvin Barrett, 29, plead guilty over the summer. In December 2013, Barrett -- who was 27 at the time -- was charged with a hate crime for punching 79-year-old Roy Coleman, fracturing the man's jaw in two places.

One aggressive citizen is fighting back against the “Knockout” game. And there could be more. Is street justice the answer to a violent game where…