*242 OPINION
By the Court,
This is an appeal from judgment of conviction of the crime of first degree murder for which, pursuant to jury verdict, the appellant has been sentenced to suffer the death penalty. The defense, in substance, was that of temporary insanity.
The sole assignment of error is failure of the trial court to give the following instruction: “It is a well settled rule of law that insanity is no excuse for the commission of a crime unless there exists such defect of reason that the person charged did not know the nature and quality of his act, or, if he did know it, that he did not know he was doing what was wrong. In other words, a person may be insane and still responsible for his acts. However, evidence of insanity, which does not *243 relieve the defendant of his guilt, may still be considered by the jury for the purpose of determining the degree of the crime. In other words, the evidence of insanity may be considered by you on the issues of malice, premeditation, deliberation and intent, and may reduce the grade of the offense charged.”
This instruction incorporates the so-called doctrine of diminished or partial responsibility which has been expressly rejected in this State. State v. Skaug,
Notwithstanding these decisions we have, in conjunction with our opinion in State v. Sollars filed this day,
Support for the partial responsibility doctrine comes through analogy with the rule applicable in cases of intoxication to the effect that evidence of intoxication may be considered for the purpose of determining whether it was such as “so clouds the mind * * * as to interfere with the formation of deliberate and premeditated purpose to kill.” State v. Jukich,
In our view the analogy to intoxication cases is not valid. In State v. Johnny, supra, this court approved an instruction which emphasized the degree of “cloudiness of mind” which is necessary if the capacity to premeditate is to be held affected. The instruction stated,
A mind so prostrated by disease as to be unable to formulate an intent or to deliberate or premeditate is a mind unable to know the nature and quality of a criminal act or that the act was wrong. It is an insane mind under our definition of insanity. In such a case the defendant is entitled not to a reduction in the degree of crime (as in the intoxication cases) but to outright acquittal. By the same token, a mind capable of knowing right from wrong must be regarded as capable of entertaining intent and of deliberating and premeditating. We may note that acquittal by reason of insanity in Nevada results in commitment to the State Hospital. NRS 175.445. If it be held that mental illness not sufficient to constitute insanity may destroy one’s capacity to premeditate, it may as reasonably be held to destroy one’s capacity to entertain intent. This could well result in verdicts of outright acquittal. The public protection provided by commitment would be lost, although the acquittal was predicated upon lack of capacity, that is upon mental illness against which the public should have protection.
The rule of partial responsibility, by a confusion of *245 terms all having to do with mental or intellectual capacity, would seem simply to extend the area within which the conscience of a jury may act upon what it regards to be mitigating circumstances. By statute mitigation is available to the jury only within the area of first degree murder where assessment of punishment by the jury is proper. Reduction in degree of the crime is not available to the jury upon the basis of mitigating circumstances but only upon the basis of lack of proof of the elements of the crime as fixed by law. State v. Skaug, supra.
We conclude that the rejection of the doctrine of partial responsibility was proper.
Defendant contends that even eliminating the issue of insanity, the offered instruction was proper on the issue of premeditation; that this is an issue he is entitled to raise entirely apart from that of insanity and as though the defense of insanity were not involved; that by the court’s refusal to give the offered instruction he has been precluded from asserting lack of premeditation. He relies upon People v. Wells,
The court in that case was concerned with the exclusion of evidence, not of insanity but of mental disorder short of insanity. The court expressly rejected the doctrine of partial responsibility but held the evidence of mental disorder admissible as material to a finding of malice. The court said,
We do not dispute the California holding. The problem *246 there dealt with the exclusion of material evidence. In the instant case all evidence of mental disorder was admitted and was available to the jury together with all other material evidence for its consideration of the state of mind of the defendant at the time of the homicide. We note first that a study of the instructions as a whole convinces us that failure to give the questioned instruction did not preclude such consideration by the jury.
Further, the Wells case (as quoted) properly lays emphasis upon the distinction between the issue of capacity to entertain malice and the question whether malice in fact was entertained. This distinction applies in the instant case.
We are here concerned with two separate factual issues. (1) Was the mind of the defendant capable of premeditating? This is the “capacity” issue upon which we have, earlier in this opinion, rejected the doctrine of partial responsibility. (2) Assuming that the defendant was capable of premeditating, did he in fact premeditate? This is the “state-of-mind” issue. Upon this issue all material evidence may be considered — evidence of what the California court has referred to as “tensions”, including the evidence of mental disorder. But all evidence must be taken into consideration. And it must show something- more than mental disorder. If evidence of mental disorder alone is to preclude premeditation it must be such as affects capacity. Otherwise we have by circuitous reasoning placed upon the State the burden of disproving mental disorder beyond a reasonable doubt. Upon the state-of-mind issue it is the tensional circumstances of the case viewed in the light of the evidence of mental disorder which are the proper concern of the jury. The issue is whether those circumstances, so viewed, raise reasonable doubt that the mind, although capable of premeditating, did in fact premeditate.
In presenting these issues to the jury they should be carefully differentiated. Otherwise confusion is bound to result for, at best, confusion is implicit in the situation. It will not do, upon the first issue, to present conflicting and confusing instructions which in effect say *247 that although the defendant had mental capacity to premeditate, yet the jury in conscientious judgment may find that he had not such capacity.'
The instruction with which we are here concerned was not a “state-of-mind” instruction, addressing itself to the second issue. Rather, read as a whole, it was a “capacity” instruction. It confined itself to evidence of capacity and invited a reduction of sentence upon the basis.of such evidence alone. To say that “evidence of insanity * * * may reduce the grade of the offense” is not a true statement of the law. It is a statement of the doctrine of partial responsibility. It was not error to reject this instruction as a “state-of-mind” instruction.
Our reexamination of the Fisko and Skaug cases leads us to one further comment. In the Fisko case,
Judgment affirmed. The district court is directed to make the proper order for execution of judgment.
