Hugo Black,
United States v. Bryan — Dissent
“ And no part of that history even tends to show that Congress meant to permit use of a witness' testimony to convict him of any crime other than perjury. There is a justifiable reason for the perjury exception. The crime consists of the testimony itself, without which no prosecution would be possible. Not so with default in producing papers. That crime is based not on a witness' testimony but rather on his failure to produce-conduct which can be proved by members of a committee, clerks, or spectators. ”
