The United States Supreme Court has held that neither the due process clause nor 18 U.S.C. § 3481, which guarantees a criminal defendant's right to take the stand in his own defense, precludes a judge, in determining sentence, from taking into account his belief that the defendant's testimony under oath contained willful and material falsehoods.
United States v. Grayson, 98 S. Ct. 2610 (1978)
Timothy J. Mains,
Constitutional Criminal Procedure - Due Process - Judgment and Sentence - Judge's Discretion to Consider Defendant's False Testimony,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol17/iss2/12