Commonwealth v. Wideman , 453 Pa. 119 ( 1973 )
Commonwealth v. Cain , 471 Pa. 140 ( 1977 )
Commonwealth v. Dancer , 460 Pa. 95 ( 1975 )
Commonwealth v. Mabie , 467 Pa. 464 ( 1976 )
Brady v. Maryland , 83 S. Ct. 1194 ( 1963 )