
    Commonwealth v. Brock, Appellant.
    Argued December 12, 1972.
    
      Jonathan Miller, Assistant Defender, with him Roger Williams, Assistant Defender, and Vincent J. Ziccardi, Defender, for appellant; Louis A. Peres, Assistant District Attorney, with him Milton M. Stein, Assistant District Attorney, Richard A. Sprague, First Assistant District Attorney, and Ar-len Specter, District Attorney, for Commonwealth, ap-pellee.
   Judgment of sentence affirmed.  