Michael a. Knowles, Warden v. Alexandre Mirzayance

Decided March 24, 2009. Clarence Thomas delivered the opinion of the Court.

Docket 07-1315 · 556 U.S. 111 (2009) · Cited 2,888 times

Holding

W hether the state-court decision is reviewed under § 2254(d)(1)’s standard or de novo, Mirzayance has failed to establish that his counsel’s performance was ineffective.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court — read the official opinion for authority.

How the Justices voted

Decided 9–0.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• Strickland v. Washington · 466 U.S. 668 (1984)
• Carey v. Musladin · 549 U.S. 70 (2006)
• Schriro v. Landrigan · 550 U.S. 465 (2007)
• Wright v. Van Patten · 552 U.S. 120 (2008)
• Anderson v. City of Bessemer City · 470 U.S. 564 (1985)
• Jones v. Barnes · 463 U.S. 745 (1983)
• Wiggins v. Smith, Warden · 539 U.S. 510 (2003)
• Yarborough v. Alvarado · 541 U.S. 652 (2004)
• Yarborough v. Gentry · 540 U.S. 1 (2003)
• Posters 'N' Things, Ltd. v. United States · 511 U.S. 513 (1994)
• United States v. International Business MacHines Corp. · 517 U.S. 843 (1996)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Harrington v. Richter · 562 U.S. 86 (2011)
• White v. Woodall · 572 U.S. 415 (2014)
• Marshall v. Rodgers · 569 U.S. 58 (2013)
• Andrew v. White · 604 U.S. 86 (2025)
• Shinn v. Kayer · 592 U.S. 111 (2020)
• Sexton v. Beaudreaux · 585 U.S. 961 (2018)
• Mays v. Hines · 592 U.S. 385 (2021)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

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Source: Supreme Court of the United States, slip opinions (2009). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).