People v. Tanner

13 Cal. App. 3d 596, 91 Cal. Rptr. 656, 42 A.L.R. 3d 1408, 1970 Cal. App. LEXIS 1270
California Court of Appeal·Decided December 17, 1970·No. Crim. 17346·Published·Cited by 6 cases

Opinion

Opinion

COBEY, Acting P. J.

Raymond Stewart Tanner appeals from a judgment of conviction of assault with intent to commit murder (Pen. Code, § 217) entered upon his plea of guilty. The sole issue raised by this appeal is the *598 correctness of the trial court’s refusal to grant appellant’s motion to withdraw his plea of guilty and enter instead a plea of not guilty by reason of insanity. 1 We find no error in the trial court’s refusal and affirm the judgment.

The Factual Background

Appellant was originally charged by information with kidnaping, forcible rape and assault with intent to commit murder. These charges arose from an incident involving one Dorothy Pettit. Appellant pled guilty to the assault charge and the other charges were dismissed. The court appointed two psychiatrists to examine appellant to determine whether he might be a mentally disordered sex offender. 2 (See Welf. & Inst. Code, § 5504.) Their report recommended that appellant be sent to Atascadero State Hospital for further study as a “possible” mentally disordered sex offender. As a result of this period of study appellant, upon his return, was found to be a mentally disordered sex offender and committed to Atascadero for an indeterminate period of treatment.

Six months later doctors at Atascadero determined that nothing further could be accomplished by treating appellant. They found appellant resistant to treatment and still a menace to society. Appellant was referred back to the trial court; the criminal proceedings against him were restored to the calendar.

Upon the commencement of these proceedings appellant, pursuant to Penal Code section 1016, moved to withdraw his earlier plea of guilty and enter instead a plea of not guilty by reason of insanity. The trial court ordered an evidentiary hearing on this motion. After an extended hearing of over 20 trial days, at which expert oral and documentary evidence was presented, the trail court denied appellant’s motion. Appellant was then sentenced to state prison for the term prescribed by law. This appeal followed.

The extensive evidentiary hearing held by the trial court was made necessary by the novelty of the evidence presented by appellant in support of his motion. This evidence included the fact that during his commitment at Atascadero State Hospital, appellant was discovered to possess cells with an extra male or Y chromosome. Much of the evidence at the hearing concerned the effects of this condition.

*599 Appellant introduced expert testimony and studies suggesting that males who possess this extra Y chromosome, referred to as “47 XYY individuals” are likely to exhibit certain aggressive behavioral traits. Other witnesses, both prosecution and defense, added psychiatric testimony concerning appellant’s mental condition.

Appellant’s sole contention on appeal is that this evidence was sufficient to support a change of plea by him from “guilty” to “not guilty by reason of insanity.” 3

Discussion

It is the settled law of this state that permission to withdraw one plea and to enter another, “. . . rests in the sound discretion of the trial court and a denial may not be disturbed [on appeal] unless the trial court has abused its discretion. [Citations.]” (People v. Francis. 42 Cal.2d 335, 338 [267 P.2d 8]; see also People v. Brotherton, 239 Cal.App.2d 195, 200 [48 Cal.Rptr. 513].) While applications to change a plea should be considered “liberally,” (Pen. Code, § 1018) it is equally settled that “[i]n order to justify the granting of a change of plea the trial court should have before it clear and convincing evidence. [Citations.]” (Italics added.) (People v. McDonough, 198 Cal.App.2d 84, 90 [17 Cal.Rptr. 643].)

Appellant introduced two distinct kinds of medical testimony to support his motion—one usual and the other unusual. The usual type was the psychiatric testimony. The psychiatrist for the defense, Dr. Drucker, testified that in his expert opinion appellant was legally insane at the time of the commission of the offense of which he was convicted. 4

*600 In a rebuttal the People produced testimony of the two court-appointed psychiatrists, Dr. Abe and Dr. Pollack. Both doctors testified that in their expert opinions appellant was legally sane at the time of the commission of the offense.

The unusual kind of medical testimony introduced by appellant was that of two geneticists, Dr. Melnyk and Dr. Thompson. This testimony, which consumed almost all of the hearing, concerned the “47 XYY” Syndrome. These witnesses first testified that appellant is in fact a “47 XYY individual.” They then comprehensively explained the procedures followed in identifying such individuals and described the physiological manifestations of this chromosomal abnormality.

They then testified about some of the behavioral manifestations that have been attributed to this particular chromosomal abnormality. This testimony was the principle underpinning of appellant’s argument. These witnesses testified about recent studies of “47 XYY individuals” by themselves and other geneticists reported in the medical literature. These studies suggest that such individuals exhibit aggressive behavior as a causal result of this chromosomal abnormality. Appellant’s position is that, as a result of his abnormal complement of chromosomes, he was legally insane at the time of the commission of the offense for which he was convicted.

The testimony and documentary evidence introduced on this point was voluminous and complex. Certain facts of special importance are apparent, however. The studies of the “47 XYY individuals” undertaken to this time are few, they are rudimentary in scope, and their results are at best inconclusive.

On the primary issue, the behavioral effects of this abnormal condition, the testimony of appellant’s expert witnesses suggests only that aggressive behavior may be one manifestation of the XYY Syndrome. The evidence collected by these experts does not suggest that all XYY individuals are by nature involuntarily aggressive. Some identified XYY individuals have not exhibited such behavior.

The expert testimony on behalf of appellant was deficient in two further respects. First, the experts could not determine whether appellant’s aggressive behavior, namely, the commission of an assault with intent to commit *601 murder, resulted from his chromosomal abnormality. 5 Second, none of the expert witnesses on genetics testified that possession of this extra Y chromosome results in mental disease which constitutes legal insanity under the California version of the M’Naghten Rule quoted in footnote 4 to this opinion.

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People v. Tanner, 13 Cal. App. 3d 596, 91 Cal. Rptr. 656, 42 A.L.R. 3d 1408, 1970 Cal. App. LEXIS 1270 (Cal. Ct. App. 1970).

13 Cal. App. 3d 596 (People v. Tanner) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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