“Derek Chauvin, the policeman who killed George Floyd in Minneapolis in 2020, had a history of citizen complaints and was thought to be “tightly wound,” not a trait ideal for someone patrolling the streets with a deadly weapon. But under the police union’s collective bargaining agreement, the police commissioner lacked the authority to dismiss Chauvin, or even reassign him. The lack of supervisory authority resulted in harms that continue to reverberate in American society.”
https://reason.com/2023/01/26/public-unions-vs-the-public-good/