The Delaware Department of Justice on Tuesday announced indictments against 16 state prison inmates on murder charges stemming from the death of a corrections officer during the Feb. 1 takeover of James T. Vaughn Correctional Center, which left a veteran corrections officer dead.

The announcement was made more than eight months after inmates seized control of the prison’s C Building for more than 18 hours. During the incident, Lt. Steven Floyd Jr. was killed, and two other guards and a female counselor were taken hostage in the process.