Over the past decade, the Manchester Police Department has faced several incidents involving officer misconduct. Notable cases include the dissemination of a racist meme by Officer Christian Horn in 2021, leading to his suspension and sensitivity training; the failure of supervisors Sgt. Derek Cataldo and Sgt. Ryan Boyton to report the incident; and the 2023 incident where Sgt. Mark Harrington threw a can at a filmmaker during a VIP detail, resulting in reprimands and suspension from such assignments. Additionally, Officer Michael MacNeilly faced multiple domestic violence charges in 2024, leading to administrative leave. These cases highlight issues related to conduct unbecoming of an officer, neglect of duty, and domestic violence, with disciplinary actions ranging from suspensions and reprimands to administrative leave.