State of Arizona, Appellee v. Eric Boyston, Appellant

Summary

The Arizona Supreme Court affirmed Boyston's convictions for three first degree murders and attempted murder offenses, as well as his death sentences and prison terms. It held that the trial court properly rejected his intellectual-disability claim, struck two jurors for cause, excluded voluntary-intoxication evidence from the guilt-phase determination of premeditation, and found sufficient evidence of premeditation and the capital aggravators. The court also rejected challenges concerning the absence of a manslaughter instruction, the life-sentence instruction, and the death-penalty review process.