WASHINGTON (AP) Three men charged in the 2018 prison killing of notorious Boston gangster James Whitey Bulger have reached plea deals with prosecutors, according to court papers filed Monday.

The plea deals for Fotios Freddy Geas, Paul J. DeCologero and Sean McKinnon were disclosed nearly six years after the 89-year-old gangster was beaten to death in his cell at a troubled West Virginia prison.

Geas, a onetime Mafia hitman, and DeCologero, a Massachusetts gangster, were accused of repeatedly hitting Bulger in the head while McKinnon served as a lookout.

DeCologero told an inmate witness that Bulger was a snitch and that as soon as he came into their unit, they planned to kill him. DeCologero also told an inmate that he and Geas used a belt with a lock attached to it to bludgeon Bulger to death, prosecutors said.