Owen J. Roberts, United States v. Norris — Opinion of the Court
“ It is argued that to allow retraction of perjured testimony promotes the discovery of the truth and, if made before the proceeding is concluded, can do no harm to the parties. The argument overlooks the tendency of such a view to encourage false swearing in the belief that if the falsity be not discovered before the end of the hearing it will have its intended effect, but, if discovered, the witness may purge himself of crime by resuming his role as witness and substituting the truth for his previous falsehood. ”
