nably assure safety of any other person and the com- munity. 18 U.S.C.A. §§ 3141 et seq., 3142(e). *969 James L. Sultan, Boston, Mass., with whom Joseph T. Travaline, Burlington, Mass., was on brief, for defendant, appel- lant. Diane M. Kottmyer, Boston, Mass., with whom Ernest S. Dinisco, Jane E. Serene, Sp.