92
Kennedy, J., dissenting
cording to the instructions, appellant was presumed to be innocent until the jury was convinced beyond a reasonable doubt that he was guilty. The jurors were to consider separately the issue of legal sanity per se—an issue set apart from the crime charged, to be introduced by a special plea and decided by a special verdict." Id., at 795-796 (footnotes omitted).
As then-Justice Rehnquist explained the reasoning of Leland, "the existence or nonexistence of legal insanity bears no necessary relationship to the existence or nonexistence of the required mental elements of the crime." Mullaney v. Wilbur, 421 U. S. 684, 706 (1975) (concurring opinion); see also Patterson v. New York, supra, at 206 (defense of insanity considered only after the facts constituting the crime have been proved beyond a reasonable doubt); Rivera v. Delaware, 429 U. S. 877 (1976) (dismissing challenge to a Leland instruction for want of a substantial federal question).
Louisiana law follows the pattern in Leland with clarity and precision. Pursuant to La. Code Crim. Proc. Ann., Art. 552 (West 1981), the petitioner entered a dual plea of not guilty and not guilty by reason of insanity. The dual plea, which the majority does not discuss or even mention, ensures that the Winship burden remains on the State to prove all the elements of the crime. The Louisiana Supreme Court confirms this in a recent case approving the following jury instruction on the defense of insanity:
" 'In this case the accused has entered a dual plea of not guilty and not guilty by reason of insanity. As a consequence of such a plea, you must first determine whether or not the accused committed a crime [on which you have been instructed]. If you are convinced beyond a reasonable doubt that the accused did commit any of these crimes, any one of these crimes, then you must proceed to a determination of whether he was sane at the time the crime was committed and thereby crimi-
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