California, United States of America
The following excerpt is from People v. Riel, 22 Cal.4th 1153, 96 Cal.Rptr.2d 1, 998 P.2d 969 (Cal. 2000):
9. "A witness willfully false in one material part of his testimony is to be distrusted in others. You may reject the whole testimony of a witness who willfully has testified falsely as to a material point, unless from all the evidence, you shall believe the probability of truth favors his testimony in other particulars." (See also People v. Beardslee, supra, 53 Cal.3d at p. 94, 279 Cal.Rptr. 276, 806 P.2d 1311.)
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