a Federal criminal offense, or a person in the custody of the Bureau of Prisons, including a person in a Bureau of Prisons pre-trial or contracted facility, or a person in the custody of the United States Marshal Service, including a person in the United States Marshal contracted facility. (e) Restraints The term restraints means any physical or mechanical device used to control the movement of a prisoner’s body, limbs, or both. (f) Restrictive housing The term restrictive housing means any type of detention that involves— (1) removal from the general inmate population, whether voluntary or involuntary