Cite as: 512 U. S. 1 (1994)
Opinion of the Court
fundamental unfairness"); see also Darden, 477 U. S., at 178- 181 (in analyzing allegedly improper comments made by prosecutor during closing argument of guilt-innocence stage of capital trial, "[t]he relevant question is whether the prosecutors' comments 'so infected the trial with unfairness as to make the resulting conviction a denial of due process' " (quoting Donnelly, supra, at 643)). Under this standard of review, we agree with the Oklahoma Court of Criminal Appeals that the admission of this evidence did not deprive petitioner of a fair sentencing proceeding.
The evidence that petitioner received a death sentence for murdering Thompson was deemed irrelevant by the Oklahoma Court of Criminal Appeals. See Romano II, 847 P. 2d, at 391. However, if the jurors followed the trial court's instructions, which we presume they did, see Richardson v. Marsh, 481 U. S. 200, 206-207, 211 (1987), this evidence should have had little—if any—effect on their deliberations. Those instructions clearly and properly described the jurors' paramount role in determining petitioner's sentence, and they also explicitly limited the jurors' consideration of aggravating factors to the four which the State sought to prove. Regardless of the evidence as to petitioner's death sentence in the Thompson case, the jury had sufficient evidence to justify its conclusion that these four aggravating circumstances existed. Although one of the aggravating circumstances proved invalid when petitioner's conviction for the Thompson murder was overturned on appeal, the other three remained untainted and still outweighed the mitigating circumstances. See Romano II, supra, at 389, 393-394. In short, the instructions did not offer the jurors any means by which to give effect to the evidence of petitioner's sentence in the Thompson murder, and the other relevant evidence presented by the State was sufficient to justify the imposition of the death sentence in this case.
Even assuming that the jury disregarded the trial court's instructions and allowed the evidence of petitioner's prior
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