Redgate

The petitioner, James J. Redgate, requests that we hold unconstitutional his commitment as a sexually dangerous person (SDP) under G. L. c. 123A, § 6, as appearing *800in St. 1985, c. 752, § 1, to the treatment center at the Massachusetts Correctional Institution, at Bridgewater (treatment center). He argues that our decision in Commonwealth v. Arment, 412 Mass. 55, 62-63 (1992), controls. The Appeals Court held that the Arment decision renders his commitment unconstitutional. 35 Mass. App. Ct. 495, 498 (1993). We granted the Commonwealth’s application for further appellate review. We agree with…