William J. Brennan, Jr., Wong Sun v. United States — Opinion of the Court
“ Without scrutinizing the contents of Toy's ambiguous recitals, we conclude that no reference to Toy in Wong Sun's statement constitutes admissible evidence corroborating any admission by Toy. We arrive at this conclusion upon two clear lines of decisions which converge to require it. One line of our decisions establishes that criminal confessions and admissions of guilt require extrinsic corroboration; the other line of precedents holds that an out-of-court declaration made after arrest may not be used at trial against one of the declarant's partners in crime. ”
