R.I. Gen. Laws § 11-25-2: Assault or escape by a custodial unit inmate.

Every prisoner confined in any custodial unit of the adult correctional institutions or in the custody of the warden or other correctional employee while outside the confines of the institutions or in the custody of the director of behavioral healthcare, developmental disabilities and hospitals pursuant to the provisions of § 40.1-5.3-1, who shall assault the warden, or other correctional employee of the institution, or shall escape, or attempt to effect an escape, shall be sentenced by the court to a term of imprisonment in the adult correctional institutions for not less than one year nor more than twenty (20) years, that term to commence from the expiration of the original term of the prisoner.