352
Scalia, J., dissenting
retarded criminals cannot fully appreciate the death penalty has nothing to do with the deterrence rationale, but is simply an echo of the arguments denying a retribution rationale, discussed and rejected above. I am not sure that a murderer is somehow less blameworthy if (though he knew his act was wrong) he did not fully appreciate that he could die for it; but if so, we should treat a mentally retarded murderer the way we treat an offender who may be "less likely" to respond to the death penalty because he was abused as a child. We do not hold him immune from capital punishment, but require his background to be considered by the sentencer as a mitigating factor. Eddings v. Oklahoma, 455 U. S. 104, 113-117 (1982).
The Court throws one last factor into its grab bag of reasons why execution of the retarded is "excessive" in all cases: Mentally retarded offenders "face a special risk of wrongful execution" because they are less able "to make a persuasive showing of mitigation," "to give meaningful assistance to their counsel," and to be effective witnesses. Ante, at 320- 321. "Special risk" is pretty flabby language (even flabbier than "less likely")—and I suppose a similar "special risk" could be said to exist for just plain stupid people, inarticulate people, even ugly people. If this unsupported claim has any substance to it (which I doubt), it might support a due process claim in all criminal prosecutions of the mentally retarded; but it is hard to see how it has anything to do with an Eighth Amendment claim that execution of the mentally retarded is cruel and unusual. We have never before held it to be cruel and unusual punishment to impose a sentence in violation of some other constitutional imperative.
* * *
Today's opinion adds one more to the long list of substantive and procedural requirements impeding imposition of the death penalty imposed under this Court's assumed power to invent a death-is-different jurisprudence. None of those
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