Cite as: 507 U. S. 87 (1993)
Opinion of the Court
Crime: Perjury and the Elizabethan Courts, 24 Am. J. Legal Hist. 145 (1980). See also 1 Colonial Laws of New York, 1664-1719, ch. 8, pp. 129-130 (reprinting "An Act to prevent wilfull Perjury," enacted Nov. 1, 1683).
Of course, not every accused who testifies at trial and is convicted will incur an enhanced sentence under § 3C1.1 for committing perjury. As we have just observed, an accused may give inaccurate testimony due to confusion, mistake, or faulty memory. In other instances, an accused may testify to matters such as lack of capacity, insanity, duress, or self-defense. Her testimony may be truthful, but the jury may nonetheless find the testimony insufficient to excuse criminal liability or prove lack of intent. For these reasons, if a defendant objects to a sentence enhancement resulting from her trial testimony, a district court must review the evidence and make independent findings necessary to establish a willful impediment to, or obstruction of, justice, or an attempt to do the same, under the perjury definition we have set out. See USSG § 6A1.3 (Nov. 1989); Fed. Rule Crim. Proc. 32(c)(3)(D). See also Burns v. United States, 501 U. S. 129, 134 (1991). When doing so, it is preferable for a district court to address each element of the alleged perjury in a separate and clear finding. The district court's determination that enhancement is required is sufficient, however, if, as was the case here, the court makes a finding of an obstruction of, or impediment to, justice that encompasses all of the factual predicates for a finding of perjury. See App. 29 ("The court finds that the defendant was untruthful at trial with respect to material matters in this case. [B]y virtue of her failure to give truthful testimony on material matters that were designed to substantially affect the outcome of the case, the court concludes that the false testimony at trial warrants an upward adjustment by two levels" (emphasis added)). Given the numerous witnesses who contradicted respondent regarding so many facts on which she could not
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