Summary

Edward Douglass White Williamson v. United States — Opinion of the Court

The exception to the privilege is that it shall not extend to 'treason, felony, or breach of the peace.' These words are the same as those in which the exception to the privilege of Parliament is usually expressed at the common law, and were doubtless borrowed from that source. Now, as all crimes are offenses against the peace, the phrase 'breach of the peace' would seem to extend to all indictable offenses, as well those which are in fact attended with force and violence, as those which are only constructive breaches of the peace of the government, inasmuch as they violate its good order.
Source: Wikisource

Edward Douglass White Williamson v. United States — Opinion of the Court

Indeed, we think, if it be conceded that the privilege which the Constitution creates extends to an arrest for any criminal offense, such privilege would embrace exemption from any exertion of power by way of arrest and prosecution for the commission of crime, the effect of which exertion of power would be to prevent a congressman from attending a future as well as a pending session of Congress.
Source: Wikisource

Edward Douglass White Williamson v. United States — Opinion of the Court

With great elaboration it is insisted in argument that the indictment charges no crime, since there can be no such thing as a conspiracy to commit the offense of subornation of perjury. While the statutes of the United States cause every person who procures another to commit perjury to be guilty of subornation of perjury, it is said there is no punishment by statute, as at common law, for a mere attempt by an individual to induce the commission of perjury.
Source: Wikisource

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