In re Interest of K.M. ( 2018 )


Menu:
  • Nebraska Supreme Court Online Library
    www.nebraska.gov/apps-courts-epub/
    05/04/2018 12:09 AM CDT
    - 636 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    In   re I nterest of
    K.M., a child
    under18 years of age.
    State of Nebraska, appellee,
    v. K.M., appellant.
    ___ N.W.2d ___
    Filed April 20, 2018.     No. S-16-1205.
    1.	 Juvenile Courts: Appeal and Error. An appellate court reviews juve-
    nile cases de novo on the record and reaches its conclusions indepen-
    dently of the juvenile court’s findings. When the evidence is in conflict,
    however, an appellate court may give weight to the fact that the lower
    court observed the witnesses and accepted one version of the facts over
    the other.
    2.	 Sexual Assault. A victim’s lack of consent is not an element of the
    crime of sexual assault when the victim is incapable of resisting or
    appraising the nature of his or her conduct.
    3.	 ____. To render an individual incapable to consent to sexual conduct, a
    mental impairment must be severe. A person in this category is treated
    as equivalent to a severely intoxicated or an unconscious person. Not
    every mental challenge or impairment is so severe that the person lacks
    the capacity to consent.
    4.	____. Lack-of-capacity sexual assault under 
    Neb. Rev. Stat. § 28-319
    (1)(b) (Reissue 2016) requires on the part of the victim “a
    significant abnormality, such as severe intoxication or other substantial
    mental or physical impairment.”
    5.	 Sexual Assault: Proof. To prove a lack-of-capacity sexual assault on
    the basis of a mental impairment, under 
    Neb. Rev. Stat. § 28-319
    (1)(b)
    (Reissue 2016), the State must prove beyond a reasonable doubt that the
    victim’s impairment was so severe that he or she was mentally incapable
    of resisting or mentally incapable of appraising the nature of the sexual
    conduct with the alleged perpetrator.
    6.	 Sexual Assault: Evidence: Testimony. Under 
    Neb. Rev. Stat. § 28-319
    (1)(b) (Reissue 2016), while expert testimony as to a victim’s
    - 637 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    mental incapacity may be probative, expert testimony is not required in
    every case of lack-of-capacity sexual assault based on the victim’s men-
    tal illness or impairment.
    Petition for further review from the Court of Appeals, Inbody,
    Pirtle, and R iedmann, Judges, on appeal thereto from the
    Separate Juvenile Court of Douglas County, Vernon Daniels,
    Judge. Judgment of Court of Appeals affirmed.
    Thomas C. Riley, Douglas County Public Defender, and
    Timothy F. Shanahan for appellant.
    Donald W. Kleine, Douglas County Attorney, Anthony
    M. Hernandez, and Laura E. Lemoine, Senior Certified Law
    Student, for appellee.
    Heavican, C.J., Cassel, Stacy, and Funke, JJ., and Colborn
    and Samson, District Judges.
    Funke, J.
    I. NATURE OF CASE
    The separate juvenile court of Douglas County adjudicated
    K.M. as being a “juvenile who has committed an act which
    would constitute a felony under the laws of this state”1 by
    committing first degree sexual assault, having “subject[ed]
    another person to sexual penetration [and] who knew or
    should have known that the victim was mentally or physi-
    cally incapable of resisting or appraising the nature of his or
    her conduct.”2
    On appeal, the Nebraska Court of Appeals reversed the
    adjudication, finding insufficient evidence to uphold K.M.’s
    adjudication by proof beyond a reasonable doubt.3 The State
    1
    
    Neb. Rev. Stat. § 43-247
    (2) (Reissue 2016).
    2
    
    Neb. Rev. Stat. § 28-319
    (1)(b) (Reissue 2016).
    3
    In re Interest of Kalen M., No. A-16-1205, 
    2017 WL 4675799
     (Neb. App.
    Oct. 17, 2017) (selected for posting to court website).
    - 638 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    petitioned for further review, which we granted. Because the
    State failed to prove beyond a reasonable doubt that K.M.
    knew or should have known that D.F., the alleged victim, “was
    mentally or physically incapable of resisting or appraising the
    nature of the conduct,” we agree with the Court of Appeals and
    affirm its ruling.
    II. BACKGROUND
    Omaha Police Department Det. Kristine Love received a
    report in early 2016 from Child Protective Services that a
    school teacher had reported D.F.’s report of sexual contact with
    K.M. while at D.F.’s home. D.F. has Asperger syndrome.4 Love
    observed a forensic interview that was conducted with D.F. at
    Project Harmony, a child advocacy center, and then conducted
    her own interview with D.F.
    After interviewing D.F., Love contacted K.M. at his school
    and asked him to speak with her in an interview at police head-
    quarters, which K.M. agreed to do. Upon the completion of the
    interview, Love arrested K.M. for first degree sexual assault
    based on statements he made during the interview. K.M. turned
    13 years old shortly after the alleged incident but before being
    interviewed by Love; D.F. was 12 years old.
    The Douglas County Attorney filed a petition to adjudicate
    K.M. under § 43-247(2). The petition alleged that K.M. com-
    mitted conduct that would constitute first degree sexual assault
    under § 28-319(1)(b) based on D.F.’s mental impairment. K.M.
    denied the allegation in the petition.
    1. A djudication Hearing
    On November 4, 2016, an adjudication hearing was held
    before the separate juvenile court of Douglas County. Because
    4
    See Asperger Syndrome, Autism Speaks, https://www.autismspeaks.org/
    what-autism/asperger-syndrome (last visited Apr. 11, 2018) (indicating
    that what was previously diagnosed as Asperger syndrome has now been
    categorized as autism spectrum disorder since the publication of the
    DSM-5 diagnostic manual in 2013).
    - 639 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    K.M. denied the petition’s allegation, the State had the burden
    to prove his guilt by proof beyond a reasonable doubt.5
    (a) Video Interview
    Love testified about the investigation and her interview
    with K.M. A video recording of the interview was entered
    into evidence.
    The video shows that K.M. waived his Miranda 6 rights
    at the beginning of the interview. Love advised K.M. of the
    allegations made by D.F., which K.M. initially denied. K.M.
    stated that he would never do that to D.F. because it would
    be wrong, explaining that D.F. has autism and does not know
    right from wrong and that it would be as if K.M. were cor-
    rupting him. After approximately 40 minutes, K.M. admitted
    that his penis may have penetrated D.F.’s anus approximately
    2 centimeters.
    (b) Other Evidence
    The State also presented the testimony of Sarah Cleaver, a
    pediatric nurse practitioner at Project Harmony. Cleaver per-
    formed a medical examination of D.F. at Project Harmony’s
    medical clinic and authored a report of her examination of
    D.F. In doing so, she relied on her examination; a medical his-
    tory from D.F.’s mother, which included the fact that D.F. has
    Asperger syndrome and attention deficit hyperactivity disorder;
    and D.F.’s statements in the Child Protective Services report
    and the Project Harmony forensic interview. Cleaver’s diagno-
    sis of D.F. was suspected child sexual abuse, constipation, and
    anal fissures. She attributed D.F.’s anal fissures to his history
    of constipation, but said that they could have also been caused
    by the penile-anal penetration that he reported.
    The court admitted Cleaver’s report, which included D.F.’s
    allegations from the Child Protective Services report and
    5
    
    Neb. Rev. Stat. § 43-279
    (2) (Reissue 2016).
    6
    Miranda v. Arizona, 
    384 U.S. 436
    , 
    86 S. Ct. 1602
    , 
    16 L. Ed. 2d 694
    (1966).
    - 640 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    Cleaver’s examination, over K.M.’s objection on hearsay and
    the Confrontation Clause. The court overruled the objections
    on the basis of the hearsay exception for statements made for
    the purpose of medical diagnosis.
    On cross-examination, Cleaver said that she thought the
    most likely explanation for D.F.’s anal fissures was his con-
    stipation, as D.F. reported to her he had a large stool and then
    his bottom began to bleed. She agreed that she could not reach
    any conclusion about sexual assault from the anal fissures.
    She did not give any testimony or opinion about D.F.’s mental
    condition beyond stating that this diagnosis had been reported
    to her.
    Neither D.F. nor K.M. testified at the hearing. And no spe-
    cific evidence about D.F.’s Asperger syndrome diagnosis or
    mental condition was offered at the hearing.
    The juvenile court issued an order adjudicating K.M. under
    § 43-247(2), finding the State had proved its case by proof
    beyond a reasonable doubt. K.M. appealed.
    2. Court of A ppeals’ Opinion
    On appeal to the Court of Appeals, K.M.’s sole assignment
    of error was that “[t]he Juvenile Court erred in finding that
    [K.M.] subjected D.F. . . . to sexual contact because the evi-
    dence presented at trial was insufficient to support a finding
    of guilt.”
    The Court of Appeals concluded that the State had proved
    beyond a reasonable doubt that K.M. subjected D.F. to sexual
    penetration, relying on K.M.’s confession in the interview.
    But it concluded that the State had failed to prove that K.M.
    “knew or should have known that [D.F.] was mentally or
    physically incapable of resisting or appraising the nature of
    his conduct.”7
    The Court of Appeals said that to prove a sexual assault
    under § 28-319(1)(b), the State must establish (1) a significant
    7
    In re Interest of Kalen M., supra note 3, 
    2017 WL 4675799
     at *2.
    - 641 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    abnormality, such as severe intoxication or other substantial
    mental or physical impairment, on the part of the alleged vic-
    tim and (2) knowledge of the abnormality on the part of the
    alleged attacker.
    The court further said:
    [T]here was no evidence presented by the State regarding
    where [D.F.’s] autism fell on the autism spectrum, whether
    [D.F.’s] autism would render [him] incapable of resisting
    or appraising the nature of [K.M.’s] conduct, and whether
    [K.M.] knew or should have known of [D.F.’s] inability to
    resist or appraise the nature of [K.M.’s] conduct.8
    It concluded that the State had failed to prove its allegation
    beyond a reasonable doubt, because it did not present any evi-
    dence of D.F.’s inability to resist or appraise the nature of his
    conduct, beyond reports that D.F. had autism. As a result, the
    Court of Appeals reversed the adjudication.
    The State petitioned for further review, which we granted.
    III. ASSIGNMENTS OF ERROR
    The State argues that the Court of Appeals “erred in deter-
    mining that the State failed to adduce sufficient evidence that
    [K.M.] knew or should have known that [D.F.] was mentally
    or physically incapable of resisting or appraising the nature of
    his conduct.”
    IV. STANDARD OF REVIEW
    [1] An appellate court reviews juvenile cases de novo on
    the record and reaches its conclusions independently of the
    juvenile court’s findings.9 When the evidence is in conflict,
    however, an appellate court may give weight to the fact that the
    lower court observed the witnesses and accepted one version of
    the facts over the other.10
    8
    
    Id.
    9
    In re Interest of Elainna R., 
    298 Neb. 436
    , 
    904 N.W.2d 689
     (2017).
    10
    In re Interest of LeVanta S., 
    295 Neb. 151
    , 
    887 N.W.2d 502
     (2016).
    - 642 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    V. ANALYSIS
    Before we reach the merits of this matter, we will address
    a proposition of law articulated by the State during oral argu-
    ment. The State asserted that on a claim of insufficiency of the
    evidence, an appellate court will not set aside a guilty verdict
    in a juvenile case where such verdict is supported by relevant
    evidence. The State seems to be importing into juvenile matters
    a standard of review applicable in adult criminal matters.
    It is correct that Nebraska appellate courts have imported
    criminal standards into juvenile cases on other instances. For
    example, we have applied the same standard of review for a
    motion to suppress filed by a juvenile in juvenile court.11 In
    ordering restitution, juvenile courts are to consider factors
    similar to those utilized in the criminal restitution statute.12
    The Court of Appeals has applied the criminal standard for
    withdrawal of a plea in the context of a request to withdraw an
    admission in a juvenile proceeding.13
    However, in only one juvenile matter, In re Interest of
    McManaman,14 did we apply a standard of review applica-
    ble in adult criminal proceedings. In that matter, we stated
    that we
    “‘will not interfere with a verdict of guilty based on con-
    flicting evidence unless, as a matter of law, the evidence
    is so lacking in probative force that it is insufficient to
    support the finding of guilt beyond a reasonable doubt. .
    . . A guilty verdict of the fact finder in a criminal case
    must be sustained if there is substantial evidence, taking
    the view most favorable to the State, to support it.’”15
    Instead, in juvenile matters, we have routinely held that
    our review is de novo on the record and that an appellate
    11
    See In re Interest of Miah S., 
    290 Neb. 607
    , 
    861 N.W.2d 406
     (2015).
    12
    In re Interest of Laurance S., 
    274 Neb. 620
    , 
    742 N.W.2d 484
     (2007).
    13
    In re Interest of Justin V., 
    18 Neb. App. 960
    , 
    797 N.W.2d 755
     (2011).
    14
    In re Interest of McManaman, 
    222 Neb. 263
    , 
    383 N.W.2d 45
     (1986).
    15
    
    Id. at 265-66
    , 
    383 N.W.2d at 47
    .
    - 643 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    court is required to reach a conclusion independent of the
    lower courts’ findings.16 We find this de novo standard of
    review to be most applicable to juvenile matters. As a result,
    we take this opportunity to disapprove of our holding in In
    re Interest of McManaman as it relates to importing into a
    juvenile matter the standard of review used in adult criminal
    proceedings.
    In turning to the merits of the instant matter, § 43-247
    defines and delimits the boundaries of the jurisdiction of
    juvenile courts. Under § 43-247(2), juvenile courts may exer-
    cise jurisdiction over “[a]ny juvenile who has committed an
    act which would constitute a felony under the laws of this
    state . . . .”
    When the State, as it did here, alleges that a juvenile has
    committed a felony and is thus subject to juvenile court juris-
    diction under § 43-247(2), the juvenile is entitled to contest
    the allegations in an adjudication hearing.17 Where the juvenile
    denies the allegations, the State must prove its case by proof
    beyond a reasonable doubt.18
    The felony that the State alleges K.M. committed constitutes
    first degree sexual assault under § 28-319, which provides:
    (1) Any person who subjects another person to sexual
    penetration (a) without the consent of the victim, (b) who
    knew or should have known that the victim was mentally
    or physically incapable of resisting or appraising the
    nature of his or her conduct, or (c) when the actor is nine-
    teen years of age or older and the victim is at least twelve
    but less than sixteen years of age is guilty of sexual
    assault in the first degree.
    The State did not allege that K.M.’s act of sexually pen-
    etrating D.F. was “without the consent of the victim,” under
    § 28-319(1)(a). Rather, it argues that K.M.’s conduct violated
    16
    See In re Interest of Elainna R., supra note 9.
    17
    See § 43-279.
    18
    § 43-279(2).
    - 644 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    § 28-319(1)(b), because he “knew or should have known that
    [D.F.] was mentally or physically incapable of resisting or
    appraising the nature of his or her conduct.”19
    [2] A victim’s lack of consent is not an element of the crime
    of sexual assault when the victim is incapable of resisting or
    appraising the nature of his or her conduct.20 Thus, in this mat-
    ter, the State was required to prove beyond a reasonable doubt
    that D.F. lacked the capacity to consent to the sexual penetra-
    tion and that K.M. knew or should have known that D.F. lacked
    the capacity to consent.21
    While K.M. acknowledged that D.F. was autistic and that
    he did not know right from wrong, such language reflects our
    application of the M’Naghten rule—to determine whether a
    person is not criminally responsible for his or her actions22—
    not to determine whether a victim had the capacity to consent.
    Instead, the law of sexual assault has traditionally recognized
    certain circumstances under which an individual lacks the
    capacity to consent to sexual conduct and where sexual con-
    tact with that person thus constitutes sexual assault: where
    the victim is severely intoxicated—whether the intoxicant be
    administered by the defendant, another, or self-administered23;
    where the victim is unconscious24; and where the victim is
    “mentally incompetent.”25
    19
    Brief on petition for further review for appellee at 3.
    20
    State v. Rossbach, 
    264 Neb. 563
    , 
    650 N.W.2d 242
     (2002).
    21
    See 
    id.
    22
    See 
    9 A.L.R.4th 526
     (1981).
    23
    Wayne R. LaFave, Criminal Law §§ 17.3(e) and 17.4(b) (6th ed. 2017).
    See, also, State v. Sanders, 
    269 Neb. 895
    , 
    697 N.W.2d 657
     (2005)
    (intoxication); State v. Freeman, 
    267 Neb. 737
    , 
    677 N.W.2d 164
     (2004);
    Rossbach, 
    supra note 20
    ; 3 Charles E. Torcia, Wharton’s Criminal Law
    § 282 (15th ed. 1995).
    24
    LaFave, supra note 23. See, also, Freeman, 
    supra note 23
    ; State v.
    Moeller, 
    1 Neb. App. 1046
    , 
    510 N.W.2d 500
     (1993).
    25
    LaFave, supra note 23, § 17.4(b) at 1151.
    - 645 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    We address in turn two issues regarding the requisite proof
    for a lack-of-capacity sexual assault under § 28-319(1)(b)
    based on a victim’s mental impairment: the type or severity of
    mental impairment required for an individual to lack the capac-
    ity to consent, and whether expert testimony is necessary to
    prove a lack of capacity based on mental impairment.
    1. Severity of Mental
    Impairment
    [3,4] To render an individual incapable to consent to sexual
    conduct, a mental impairment must be severe.26 A person in
    this category is treated as equivalent to a severely intoxicated
    or an unconscious person.27 Thus, not every mental challenge
    or impairment is so severe that the person lacks the capacity to
    consent.28 We have said lack-of-capacity sexual assault under
    § 28-319(1)(b) requires on the part of the victim “a significant
    abnormality, such as severe intoxication or other substantial
    mental or physical impairment.”29
    In Reavis v. Slominski,30 this court considered a civil tort
    claim for battery based on an alleged sexual assault, but relied
    on and discussed Nebraska’s criminal sexual assault statutes
    in considering the issue of consent. The court was divided
    and issued four separate opinions, with none commanding a
    majority.31 However, some of the opinions in Reavis are help-
    ful here.
    The lead opinion by Justice Lanphier discussed the approach
    taken by other jurisdictions when considering consent and
    said that “[i]t would appear that issue of effective consent
    to sexual contact is generally only raised when the victim
    26
    Rossbach, supra note 20.
    27
    LaFave, supra note 23.
    28
    See id.
    29
    Rossbach, 
    supra note 20
    , 
    264 Neb. at 572
    , 
    650 N.W.2d at 250
    .
    30
    Reavis v. Slominski, 
    250 Neb. 711
    , 
    551 N.W.2d 528
     (1996).
    31
    
    Id.
    - 646 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    suffers from an extreme mental handicap or deficiency.”32 One
    of the dissenting opinions, written by Justice Caporale and
    joined by Justice Fahrnbruch, said that “other jurisdictions
    have concluded that one has such capacity if one understands
    and appreciates the nature of the act of sexual intercourse, its
    character, and the probable or natural consequences which may
    attend it.”33 While the opinions in that case sharply disagreed
    on some aspects of the law of consent, there was a general
    consensus that to establish a lack of consent based on a mental
    impairment, the impairment must be severe.34
    The Kansas Court of Appeals has articulated the following
    standard: “If an individual can comprehend the sexual nature
    of the proposed act, can understand he or she has the right to
    refuse to participate, and possesses a rudimentary grasp of the
    possible results arising from participation in the act, he or she
    has the capacity to consent.”35
    [5] Thus, we hold that to prove a lack-of-capacity sex-
    ual assault on the basis of a mental impairment, under
    § 28-319(1)(b), the State must prove beyond a reasonable
    doubt that the victim’s impairment was so severe that he or
    she was “mentally . . . incapable of resisting” or “mentally . . .
    incapable of . . . appraising the nature of” the sexual conduct
    with the alleged perpetrator.
    2. Necessity of Expert
    Testimony
    Having found that proving lack-of-capacity sexual assault
    based on a mental impairment requires the State to prove that
    the victim’s impairment is so severe that he or she is mentally
    unable to resist or understand the nature of the sexual act, we
    32
    Id. at 722, 
    551 N.W.2d at 538
     (Lanphier, J.).
    33
    
    Id. at 743
    , 
    551 N.W.2d at 549
     (Caporale, J., dissenting; Fahrnbruch, J.,
    joins). See, also, State v. Johnson, 
    155 Ariz. 23
    , 
    745 P.2d 81
     (1987).
    34
    See, generally, Reavis, 
    supra note 30
    .
    35
    State v. Ice, 
    27 Kan. App. 2d 1
    , 5, 
    997 P.2d 737
    , 740 (2000).
    - 647 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    must also determine whether expert testimony is required to
    establish this fact.
    Under 
    Neb. Rev. Stat. § 27-702
     (Reissue 2016), if scientific,
    technical, or other specialized knowledge will assist the trier of
    fact to understand the evidence or to determine a fact in issue,
    a witness qualified as an expert by knowledge, skill, experi-
    ence, training, or education, may testify thereto in the form of
    an opinion or otherwise.
    However, when an expert’s opinion on a disputed issue is a
    conclusion which may be deduced equally as well by the trier
    of fact with sufficient evidence on the issue, the expert’s opin-
    ion is superfluous and does not assist the trier in understanding
    the evidence or determining a factual issue.36
    In State v. Collins, the Court of Appeals considered this
    question and concluded that “[w]hether expert testimony as to
    a victim’s mental or physical capacity to resist or to appraise
    the nature of the perpetrator’s conduct is indispensable in a
    prosecution under § 28-319(1)(b) must be approached on a
    case-by-case basis.”37
    Several other jurisdictions have also considered the need for
    expert testimony and have concluded that a lay juror is able to
    assess the extent of a victim’s mental capacity in the context of
    lack-of-capacity sexual assaults.38
    A person’s capacity to understand something is a factual
    issue for the jury and, like other facts, may properly be estab-
    lished by circumstantial evidence.39 More particularly, evidence
    explaining what a person knows and how the person came to
    know it may well give rise to an inference of incapacity.
    36
    Schafersman v. Agland Coop, 
    262 Neb. 215
    , 
    631 N.W.2d 862
     (2001).
    37
    State v. Collins, 
    7 Neb. App. 187
    , 202, 
    583 N.W.2d 341
    , 350-51 (1998).
    38
    See, Jackson v. State, 
    890 P.2d 587
     (Alaska App. 1995); State v. Summers,
    
    70 Wash. App. 424
    , 
    853 P.2d 953
     (1993); State v. Wallin, 
    52 Kan. App. 2d 256
    , 
    366 P.2d 651
     (2016); Fuentes v. State, 
    454 Md. 296
    , 
    164 A.3d 265
    (2017); State v. Hunt, 
    365 N.C. 432
    , 
    722 S.E.2d 484
     (2012).
    39
    Jackson, 
    supra note 38
    .
    - 648 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    While expert testimony as to a victim’s mental incapac-
    ity may be probative, and might be required in some factual
    situations, there is no basis for requiring the State to estab-
    lish mental incapacity by expert testimony in every case.40
    Evidence which establishes a victim’s inability to understand
    the nature and consequences of sexual intercourse is not the
    kind of technical evidence which requires medical testimony
    to decipher. Unlike evidence of medical or legal malpractice,
    or the functions of technical equipment, a witness’ compre-
    hension of the basic consequences of his or her actions may be
    proved or disproved from his or her testimony and testimony
    as to behavior.
    [6] As a result, we conclude that while expert testimony as
    to a victim’s mental incapacity may be probative, expert testi-
    mony is not required in every case of lack-of-capacity sexual
    assault based on the victim’s mental illness or impairment.
    3. A pplication
    The State’s evidence that D.F. lacked the capacity to con-
    sent to the sexual penetration by K.M. is reducible to a sec-
    ondhand report that D.F. had been diagnosed with Asperger
    syndrome. The State’s evidentiary showing was insufficient
    to prove beyond a reasonable doubt that D.F. was, in fact,
    incapable of resisting or appraising the nature of the sex-
    ual conduct.
    The State presented no evidence about D.F.’s diagnosis.
    It presented no expert testimony on the nature of Asperger
    syndrome or how it affects an individual’s ability to resist or
    understand the nature of sexual conduct. D.F. did not testify,
    and the trier of fact was unable to judge D.F.’s level of mental
    impairment. No evidence was given about D.F.’s own abil-
    ity to resist or understand sexual acts. The State apparently
    relies on the fact of the reported diagnosis and the testimony
    of K.M.
    40
    Summers, supra note 38.
    - 649 -
    Nebraska Supreme Court A dvance Sheets
    299 Nebraska R eports
    IN RE INTEREST OF K.M.
    Cite as 
    299 Neb. 636
    Given the dearth of evidence regarding D.F.’s mental ability,
    the State understandably focused its arguments in its appel-
    late brief on the evidence that the penetration occurred and on
    K.M.’s statements showing that he knew that D.F. had autism
    and was “mentally slower than where he should be.”41 But the
    occurrence of the penetration is not the primary issue in dis-
    pute. And K.M.’s knowledge of D.F.’s autism does not estab-
    lish that D.F.’s mental condition was so severe that he lacked
    the capacity to consent.
    Moreover, K.M.’s statement that D.F. has autism and does
    not know right from wrong fails to show that D.F. lacked the
    capacity to consent. A 13-year-old boy’s comment bearing on
    the quality of D.F.’s moral reasoning does nothing to show that
    D.F. suffered from a mental impairment so severe that he was
    unable to resist or understand sexual conduct. Nor is K.M.’s
    comment about how it would be wrong for him to engage in
    sexual conduct with D.F. of any help to the State. The test for
    a lack-of-capacity sexual assault is not one of the defendant’s
    morality, but of the victim’s ability to resist or appraise the
    nature of the sexual conduct.
    The State bears the burden, when proving sexual assault
    based on the victim’s lack of capacity, that the victim actually
    lacked the capacity to consent. It has not done so here.
    VI. CONCLUSION
    For the reasons set forth herein, we affirm the Court of
    Appeals’ reversal of the juvenile court’s adjudication.
    A ffirmed.
    Miller-Lerman, J., participating on briefs.
    Wright, J., not participating.
    41
    Brief for appellee at 14.