It’s when police officers mistakenly harm their fellow officers that we really see the problems with law enforcement narratives. Last September, St. Louis police reportedly beat and arrested a fellow police officer who had gone undercover during a series of protests. The police claimed that their fellow officer, who was black, was resisting arrest. That seems implausible. By the time the officer is getting arrested, there would be little reason for him to resist to maintain his cover. He undoubtedly knew how the police operate. He undoubtedly knew that resisting would bring a beating and an arrest. That both happened...