'A slap on the wrist'

IF A WITNESS hadn’t shot video of two Prince George’s County police officers savagely beating John McKenna, a University of Maryland student, after a March 2010 men’s basketball game, that would probably have been the end of it. The officers didn’t file a report, as required, on their use of force. When initially questioned about the beating, they lied. And when they filled out the initial paperwork on the incident, police said Mr. McKenna had sustained his injuries, including a concussion, from being kicked by a police horse.