From More Adventures In Police Professionalism by Radley Balko:
U.S. District Judge Julie Robinson recently awarded Barron Bowling $830,000 for the beating he suffered at the hands of DEA Agent Timothy McCue. McCue and Bowling got into an accident in Kansas City, Kansas, after which McCue emerged from his car, gun drawn, and beat the leaving hell out of Bowling. McCue, the DEA, and officers at the Kansas City police department then conspired to cover up the beating, leaving Bowling to face charges of leaving the scene of an accident (understandable, given that he was getting beaten at the time), and assaulting Agent McCue with his car. Witness statements incriminating McCue for both the accident and the beating were lost or destroyed, as were photos of the damage McCue did to Bowling’s face.
The good news: At least one of the Kansas City police officers has since been disciplined. He was investigated by Internal Affairs, forced into early retirement, lost his retirement health insurance, and lost part of his pension.
The bad news: Only one of them was disciplined. Oh, and he happens to be the cop who exposed the coverup.
These sorts of incidents are frightening because it shows it can happen to anyone.