More than two dozen correctional officers in Baltimore were charged Tuesday with using excessive force on prisoners at state-operated jails in a city plagued by decades of institutional corruption, inside and outside jailhouse walls.

The 25 indicted officers are accused of assaulting and threatening detainees at correctional facilities, tampering with evidence and falsifying documents, said Baltimore City State’s Attorney Marilyn Mosby, whose office secured the indictments.

Maryland corrections secretary Robert Green said all the indicted officers have been on administrative leave since 2018, when the state Department of Public Safety and Correctional Services began investigating the allegations.

Gov. Larry Hogan said in a statement that his administration has no tolerance for corruption in the state’s correctional system.