For years, the Boston Police kept a secret: the union president was an alleged child molester - The Boston Globe
Despite 1995 evidence, Patrick Rose kept his badge, worked on child sexual assault cases, and ascended to power in the police union. He went on to allegedly molest five other children.
https://www.bostonglobe.com/2021/04/10/metro/years-boston-police-kept-secret-union-president-was-an-alleged-child-molester