Nix v. Whiteside, 475 U.S. 157 (1986) (U.S. Supreme Court)
Nix v. Whiteside is a landmark United States Supreme Court decision at the intersection of criminal procedure and professional responsibility.
Does a defense attorney's refusal to cooperate in presenting a client's perjured testimony—and the attorney's warning that he would disclose the intended perjury to the court if the client persisted—constitute ineffective assistance of counsel in violation of the Sixth Amendment or otherwise infringe the defendant's right to testify?
Under Strickland v. Washington, a defendant claiming ineffective assistance must show (1) deficient performance measured against objective professional norms and (2) resulting prejudice—a reasonable probability that, but for counsel's errors, the outcome would have been different. There is no constitutional right to the assistance of counsel in presenting perjured testimony; counsel's ethical duty to the court precludes suborning or facilitating perjury. Reasonable remedial measures to prevent client perjury, including warning the client, seeking withdrawal, and, if necessary, disclosure to the tribunal as permitted by governing ethics rules, do not constitute deficient performance under the Sixth Amendment.
No. Defense counsel's admonition that he would not permit perjury and would disclose any intended perjury to the court if necessary did not constitute ineffective assistance of counsel and did not violate the defendant's right to testify. Counsel's conduct was consistent with professional norms and did not prejudice the defense.
Nix v. Whiteside is a foundational case for understanding the limits of zealous advocacy under the Sixth Amendment. It confirms that defense counsel's duty of loyalty does not extend to presenting false testimony and that reasonable, ethics-driven remedial steps do not amount to ineffective assistance. The case harmonizes Strickland's performance and prejudice prongs with attorneys' duties of candor, and it underscores that the right to testify is a right to testify truthfully. For law students, it frequently appears in exams and professional responsibility discussions involving client perjury, narrative testimony, confidentiality, and the scope of counsel's constitutional obligations.