Olden v. Kentucky, 488 U.S. 227 (1988) (per curiam), Supreme Court of the United States
Olden v. Kentucky is a cornerstone Confrontation Clause case on a criminal defendant's right to expose a witness's bias through cross-examination.
Whether the trial court's exclusion of cross-examination showing the complainant's cohabitation with her boyfriend—evidence offered to demonstrate a powerful motive to fabricate rape—violated the defendant's Sixth Amendment right to confront witnesses against him.
The Sixth Amendment Confrontation Clause guarantees a criminal defendant the right to effective cross-examination, including the opportunity to expose a witness's bias, motive, or prejudice to the jury. While trial courts retain discretion to impose reasonable limits on cross-examination based on concerns such as harassment, prejudice, confusion of the issues, or marginal relevance, they may not impose limitations that are arbitrary or disproportionate to the purposes they are designed to serve, nor may they bar a central line of impeachment that presents a prototypical form of bias. See Davis v. Alaska, 415 U.S. 308 (1974); Delaware v. Van Arsdall, 475 U.S. 673 (1986). Constitutional error in restricting such cross-examination is subject to harmless-error review under Chapman v. California, 386 U.S. 18 (1967), but cannot be deemed harmless where the excluded evidence bears directly and significantly on a key witness's credibility in a close case.
Yes. By prohibiting cross-examination to show that the complainant was cohabiting with her boyfriend—evidence supporting the defense theory of motive to fabricate—the trial court violated the defendant's Sixth Amendment right to confrontation. The error was not harmless beyond a reasonable doubt.
Olden is a leading decision on the scope of confrontation-based cross-examination to prove bias. It clarifies that courts cannot invoke general evidentiary policies—such as avoiding prejudice or even the well-intentioned desire to shield jurors from potentially inflammatory facts—to block a defendant from presenting central impeachment that reveals a motive to fabricate. The case is frequently cited with Davis and Van Arsdall for the proposition that the Confrontation Clause protects the substance of adversarial testing, not just the form. It also guides trial practice in sexual assault prosecutions by distinguishing constitutionally required bias impeachment from impermissible character or propensity evidence, and it frames how rape-shield and Rule 403 analyses must yield when they would otherwise eviscerate a core credibility defense.