Summary

Portrait of Fred M. Vinson Fred M. Vinson United States v. Bryan — Opinion of the Court

The offense of contempt of Congress, with which we are presently concerned, on the other hand, matures only when the witness is called to appear before the committee to answer questions or produce documents and wilfully fails to do so. Until that moment he has committed no crime. There is, in our jurisprudence, no doctrine of 'anticipatory contempt.' While the witness' testimony may show that he has elected to perjure himself or commit contempt, he does not thereby admit his guilt of some past crime about which he has been summoned for questioning but commits the criminal act then and there.
Source: Wikisource

Portrait of Fred M. Vinson Fred M. Vinson United States v. Bryan — Opinion of the Court

It is now contended that the protection of the statute, which was extended to witnesses in an effort to obtain testimony, protects equally the person who wilfully withholds testimony and is prosecuted for his wilful default. This contention completely ignores the purpose of the immunity. In the first place, it imputes to Congress the contradictory and irrational purpose of granting an immunity from prosecution for contempt in order to obtain evidence of that contempt.
Source: Wikisource

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