Police officers beat people on video, a lot. And, more often than not, the officers will keep their jobs in spite of video evidence of the attack. However, an attack on a teenager by an Atlanta cop was so egregious that it did, in fact, cost him his job. And now, it is costing him his freedom. Officer Matthew Johns was indicted on eight felonies for the savage beating of a 15-year-old boy last year; and this week, he was sentenced to 20 years, with 5 being served in prison...