Family members of Boston crime boss James “Whitey” Bulger Jr. have filed a lawsuit against the Federal Bureau of Prisons and 30 unnamed employees of the prison system for failing to protect Bulger, who was beaten to death at a West Virginia prison. The family filed the lawsuit against the prison system last week, two years after Bulger, 89, was killed at United States Penitentiary, Hazelton, a federal prison in West Virginia's Preston County.