"Since 2006, the nation’s largest police departments have fired at least 1,881 officers for misconduct that betrayed the public’s trust, from cheating on overtime to unjustified shootings. But The Washington Post has found that departments have been forced to reinstate more than 450 officers after appeals required by union contracts.
Most of the officers regained their jobs when police chiefs were overruled by arbitrators, typically lawyers hired to review the process. In many cases, the underlying misconduct was undisputed, but arbitrators often concluded that the firings were unjustified because departments had been too harsh, missed deadlines, lacked sufficient evidence or failed to interview witnesses.
A San Antonio police officer caught on a dash cam challenging a handcuffed man to fight him for the chance to be released was reinstated in February. In the District, an officer convicted of sexually abusing a young woman in his patrol car was ordered returned to the force in 2015. And in Boston, an officer was returned to work in 2012 despite being accused of lying, drunkenness and driving a suspected gunman from the scene of a nightclub killing.
The chiefs say the appeals process leaves little margin for error. Yet police agencies sometimes sabotage their own attempts to shed troubled officers by making procedural mistakes. The result is that police chiefs have booted hundreds of officers they have deemed unfit to be in their ranks, only to be compelled to take them back and return them to the streets with guns and badges."
Fired/Rehired: Police chiefs are often forced to put officers fired for misconduct back on the streets - Washington Post