State v. Lenz ( 2017 )


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  •                     IN THE COURT OF APPEALS OF IOWA
    No. 16-2172
    Filed December 20, 2017
    STATE OF IOWA,
    Plaintiff-Appellee,
    vs.
    NICHOLAS ANDREW LENZ,
    Defendant-Appellant.
    ________________________________________________________________
    Appeal from the Iowa District Court for Mitchell County, Christopher C.
    Foy, Judge.
    Nicholas Lenz appeals his conviction of first-degree kidnapping.
    AFFIRMED.
    Mark C. Smith, State Appellate Defender, and Theresa R. Wilson,
    Assistant Appellate Defender, for appellant.
    Nicholas A. Lenz, Fort Madison, pro se.
    Thomas J. Miller, Attorney General, and Timothy M. Hau, Assistant
    Attorney General, for appellee.
    Considered by Danilson, C.J., and Doyle and Mullins, JJ.
    2
    MULLINS, Judge.
    Nicholas Lenz appeals his conviction of first-degree kidnapping.               His
    various arguments on appeal include: (1) the district court improperly disallowed
    questioning of the victim about her drug use at or around the time of the crime or,
    alternatively, his trial counsel was ineffective for failing to argue such evidence
    was admissible under the inexplicably-intertwined doctrine; (2) the court erred in
    allowing irrelevant and prejudicial information regarding whether a sheriff’s
    deputy thought Lenz could have shot him at the time of his arrest; (3) the statute
    defining serious injury, Iowa Code section 702.18 (2016), is unconstitutionally
    vague; (4) the evidence was insufficient to support a necessary element of the
    crime, that the victim suffered a serious injury or, alternatively, that any serious
    injury was not a result of confinement; (5) the court erred in failing to give certain
    jury instructions; and (6) the jury’s general verdict makes it unclear whether he
    was convicted on a valid or invalid basis thus warranting a new trial. Lenz also
    argues his trial counsel was ineffective in failing to raise arguments three and six
    at trial.1
    1
    Lenz also requests this court to conduct an in-camera review of the notes taken by a
    special agent of the Iowa Division of Criminal Investigation in relation to witness
    depositions in order to ensure the propriety of the district court’s determination that the
    notes did not contain exculpatory information and were therefore not discoverable. The
    discovery tool Lenz attempts to employ applies only to “statements.” State v. DeZeeuw,
    
    401 N.W.2d 226
    , 227 (Iowa Ct. App. 1986) (quoting State v. Groscost, 
    355 N.W.2d 32
    ,
    34 (Iowa 1984)). Our supreme court has stated:
    In order for statements to be subject to [discovery], which we have
    approved, it is necessary that they be written statements made by the
    witness and signed, or otherwise adopted or approved by the witness, or
    that they be a stenographic, mechanical, electrical, or other recording, or
    a transcription thereof, which is a substantially verbatim recital of an oral
    statement made by said witness and recorded contemporaneously
    without the making of such oral statement. The distinction between a
    statement made by a witness and one that is an imprecise summary of
    3
    I.     Background Facts & Proceedings
    Lenz was in a romantic relationship with Chris Sonberg in the early
    months of 2016; the two were dating at the time but the relationship was “not
    good.” On the afternoon of March 5 of that year, Lenz and Sonberg travelled
    from Mitchell, Iowa to Waterloo to visit a casino.           They spent “two hours or
    longer” at the casino. After their departure from the casino, an argument ensued
    between the two in the vehicle Lenz was driving back to Mitchell. Lenz began
    yelling at Sonberg and eventually struck her with his fists several times in her
    face, which caused her to lose consciousness—she was in-and-out of
    consciousness for the remainder of their journey.                When they arrived at
    Sonberg’s home in Mitchell, Lenz put a cigarette out on her right cheek and then
    dragged her by her hair from the car into the house while covering her mouth so
    she could not scream.
    For the next couple of days, they remained in Sonberg’s home, wherein
    Chris was “beaten a lot” by Lenz. He hit her numerous times in her head and
    what another understood the witness to say has been made on the
    federal level as well as in Iowa.
    State v. Horn, 
    828 N.W.2d 717
    , 721 (Iowa 1979). Upon a review of the documents
    requested, we conclude they are not “statements” and therefore affirm the district court’s
    conclusion that they were not discoverable materials.
    Finally, Lenz argues the district court incorrectly applied Iowa Code section
    702.18 in instructing the jury and trial counsel was ineffective in failing to object to the
    instruction. To the extent Lenz argues the district court failed to define the terms
    “protracted” or “extended” to the jury, he provides us with no authority that such a
    specific definitional instruction to the jury is required. We therefore deem the argument
    waived. See Iowa R. App. P. 6.903(2)(g)(3). To the extent Lenz argues the district
    court’s use of the term “extended” rather than “protracted” in its instruction was improper,
    we note we have previously approved the language used by the district court and affirm
    its use of the same. See, e.g., State v. Edwards, No. 10-0754, 
    2011 WL 1878600
    , at *1
    (Iowa Ct. App. May 11, 2011); State v. Billingsly, No. 03-1165, 
    2004 WL 1259726
    , at *2
    (Iowa Ct. App. June 9, 2004); see also Protract, Webster’s Third New International
    Dictionary 1826 (unabridged ed. 2002) (listing the term “extend” as a synonym for the
    term “protract”).
    4
    face and strangled her to a point that she testified she thought she was going to
    die.   Lenz also threatened Sonberg with the display of a firearm on multiple
    occasions, hit her “upside the head” with it, and pressed its muzzle against her
    flesh. At one point, when Sonberg tried to escape, Lenz chased her outside,
    slammed her to the ground, kicked her in her ribs and head, and dragged her by
    her hair back into the residence. Lenz eventually transported Sonberg to an
    abandoned camper where he zip tied her ankles to a pipe under the stove and
    then left her there for approximately four hours, during which Sonberg was
    without food, water, and heat and experienced a loss of feeling in her feet as a
    result of the tightness of the zip ties. Lenz subsequently transported Sonberg
    back to her home, where he continued to confine her.
    In the early morning hours of March 7, Sonberg’s father visited her home
    and noticed one of the home’s windows was open. He notified law enforcement
    of a possible break-in at the residence, and a Mitchell County Sheriff’s Deputy
    responded shortly thereafter.   When the deputy entered the residence with
    Sonberg’s father, he observed Lenz sleeping on a couch in the living room. The
    deputy approached Lenz and handcuffed him.         Sonberg was located in the
    bedroom of the residence. The deputy observed that she had facial injuries and
    Sonberg advised Lenz “beat her up.” The deputy removed Lenz from the home
    and secured him in his police vehicle. Lenz managed to escape the vehicle,
    however, and fled the scene. Following a foot chase, Lenz stole a car to aid him
    in his escape, but he was recaptured by authorities. Sonberg was transported to
    a nearby hospital in an ambulance. She was then life-flighted to Mayo Clinic in
    Rochester, Minnesota for treatment.
    5
    On March 8, Lenz was interviewed by police officers.2 At the outset of the
    interview, Lenz requested the officers to tell Sonberg he was sorry for what he
    did; he repeated his sorrow for his actions a number of times throughout the
    interview. He stated Sonberg wanted to go to Waterloo for drugs, and when they
    got there, they smoked about $200 worth of crack. On their way back to Mitchell
    from Waterloo, Lenz said he became upset with Sonberg and he “couldn’t take it
    anymore.” An argument ensued, during which Sonberg rolled down her window
    in an attempt to “wave somebody down,” presumably for a ride. Lenz stated he
    grabbed her by the ponytail, “threw her down,” and rolled up and locked the
    windows. He indicated he subdued her for the remainder of the journey back to
    Mitchell. At one point, Lenz said Sonberg “was really starting to piss [Lenz] off,
    so” he punched her “like ten times in her back.” Upon their arrival in Mitchell,
    Lenz admitted he dragged Sonberg into the house, after which he “beat the fuck
    out of her for like two days straight.” Lenz thought the beatings “might have
    broke[n] some of her ribs and might have broke[n] her jaw too.” Lenz said he
    eventually decided to transport Sonberg to a camper near his grandparents’
    home.       Lenz stated, in transit, he “just snapped” and “repetitively . . . hit
    [Sonberg] on her left side of her jaw” and “also in her ribs too.” While in the
    camper, Lenz admitted he zip tied Sonberg’s legs to a pipe so she would not “do
    anything stupid.” Lenz and Sonberg left the camper, and Lenz went on a bit of a
    crime spree. He subsequently transported Sonberg back to her residence and
    remained there with her. Lenz also admitted that he, at one point, taped Sonberg
    2
    An audio recording of this interview was admitted into evidence and played for the jury.
    6
    to a chair in her home. Also, when searching Sonberg’s purse, Lenz found a
    condom; he removed it from the wrapper and shoved it down Sonberg’s throat.
    Sonberg testified, throughout this ordeal, she thought she was going to
    die. As a result of the frequent beatings, she suffered severe bruising to her
    body lasting one or two weeks and, according to her, a severe concussion. She
    spent three days at Mayo, during which she underwent surgery. One of her
    doctors testified she suffered fractures to her jaw, maxillary sinus bone, and
    hyoid bone and exhibited multiple lacerations inside of her mouth. Fracturing of
    the hyoid bone is commonly caused by strangulation while the remainder of the
    injuries can be explained by blunt force trauma to the head or face. To correct
    her broken jaw, Sonberg underwent an open reduction internal fixation
    procedure.   This procedure involves the internal fixation of the jawbone with
    titanium plates.     Doctors also performed a maxillomandibular fixation, which
    required the placement of “at least six screws in the jaw.” As a result of her
    broken jaw, Sonberg experiences difficulty with speaking and eating, and her jaw
    “pops” on occasion. Her jaw line is also misaligned, which has caused chipping
    of her back teeth.
    Lenz was charged by trial information with a number of crimes in relation
    to the foregoing, including first-degree kidnapping and willful injury causing
    serious injury. A jury found him guilty on both counts. The district court denied
    Lenz’s subsequent motions for a new trial and in arrest of judgment and
    sentenced Lenz to life in prison without the possibility of parole on the kidnapping
    7
    charge.3 Lenz appeals. Additional facts may be set forth below as are relevant
    to the issues raised on appeal.
    II.       Evidentiary Rulings
    Lenz challenges the district court’s evidentiary rulings in two respects. He
    contends (1) the district court improperly disallowed questioning of the alleged
    victim about her drug use at or around the time of the crime and (2) the court
    erred in allowing irrelevant and prejudicial information regarding whether a
    sheriff’s deputy thought Lenz could have shot him at the time of his arrest. We
    review the district court’s evidentiary rulings for an abuse of discretion. State v.
    Tipton, 
    897 N.W.2d 653
    , 690 (Iowa 2017). “An abuse of discretion occurs when
    the trial court exercises its discretion ‘on grounds or for reasons clearly untenable
    or to an extent clearly unreasonable.’” 
    Id. (quoting State
    v. Buenaventura, 
    660 N.W.2d 38
    , 50 (Iowa 2003)). Even if we conclude the district court abused its
    discretion, “we will only reverse if prejudice is shown.” 
    Id. Lenz first
    complains that the district court disallowed “[a]ny evidence that
    [Sonberg] attempted to obtain drugs or used drugs near and during the time of
    the offense” and that such evidence should have been allowed because it “was
    relevant to her credibility.” In sum, Lenz wanted to be able to offer evidence that
    Sonberg visited a drug dealer shortly before, or was on drugs at, the time of the
    offense and, therefore, her recollection of the facts was not credible. We note,
    however, the district court did not prevent the presentation of such evidence.
    The court expressly noted before opening statements that any evidence of drug
    use on the part of Sonberg occurring between March 5 and 7 would “be relevant
    3
    The court merged Lenz’s willful-injury conviction with his kidnapping conviction.
    8
    to her memory and ability to accurately recall what’s happened.”        The court
    repeated this position during Lenz’s cross-examination of Sonberg, stating, “It
    would be the court’s opinion that the only relevance of drug use or alcohol
    use . . . by Ms. Sonberg would be as it might affect her ability to comprehend
    what was going on or later recollect what happened during the time in question.”
    Lenz attempted to introduce evidence that Sonberg visited a drug dealer
    at some point in time. However, Lenz was unable to provide any evidence to the
    district court in his offer of proof that Sonberg’s alleged visit to a drug dealer
    occurred in the relevant timeframe. In fact, the facts submitted to the district
    court largely indicated Sonberg’s alleged visit to a drug dealer occurred
    sometime prior to March 5. Absent any indication that Sonberg’s alleged visit to
    a drug dealer occurred within the relevant timeframe, we conclude the district
    court did not abuse its discretion in excluding the evidence.
    In any event, the allegation that Sonberg was under the influence of drugs
    during her captivity made its way to the jury when the State offered a recording of
    Lenz’s initial interview with law enforcement, wherein he stated Sonberg wanted
    to go to Waterloo for drugs, and when they got there they smoked about $200
    worth of crack together. Furthermore, rendering Sonberg’s testimony incredible
    would have done very little for Lenz’s cause, as he admitted to many of the
    criminal acts resulting in his conviction on his own accord. See State v. Parker,
    
    747 N.W.2d 196
    , 210 (Iowa 2008) (“[W]e consider a variety of circumstances in
    determining the existence of harmless error, including the existence of
    overwhelming evidence of guilt.”). We conclude the district court did not abuse
    its discretion in excluding evidence concerning Sonberg’s alleged drug-related
    9
    activities and, in any event, the exclusion of such evidence was harmless and did
    not result in prejudice or a miscarriage of justice. See 
    id. at 209.
    Lenz also argues his trial counsel was ineffective in failing to argue the
    drug evidence was admissible under the inexplicably-intertwined doctrine.
    Obviously, this doctrine’s namesake requires the proffered facts to be
    “inexplicably intertwined” with the facts underlying the charged crime.          See
    generally State v. Nelson, 
    791 N.W.2d 414
    , 423–24 (Iowa 2010). Again, there is
    nothing to show that Sonberg’s alleged visit to a drug dealer occurred in relation
    to her and Lenz’s trip to Waterloo on March 5.          Absent such evidence, the
    inextricably-intertwined argument would have been meritless.           We therefore
    conclude trial counsel was not ineffective in failing to pursue the same. See
    State v. Tompkins, 
    859 N.W.2d 631
    , 637 (Iowa 2015) (“[W]here a claimant
    alleges counsel’s failure to pursue a particular course breached an essential
    duty, there is no such duty when the suggested course would have been
    meritless.”).
    Next, Lenz contends the district court improperly allowed irrelevant and
    prejudicial information regarding whether a sheriff’s deputy thought Lenz could
    have shot him at the time of his arrest. The arresting deputy testified at trial that,
    during a post-arrest search of Sonberg’s residence, he discovered a loaded
    firearm in the couch “tucked into the cushions” “right beside where Mr. Lenz was
    sleeping.” The State questioned the deputy whether Lenz, at the time of the
    arrest, could have reached the weapon. Following an overruled objection on
    speculation grounds, the officer answered, “Yes, he could [have].”           He later
    testified, “I knew at that point that Mr. Lenz could have been able to grab that gun
    10
    and shoot me with it.” We agree this testimony was irrelevant, see Iowa R. Evid.
    5.401, but note “[e]rror in admission of evidence must be prejudicial to an
    accused to constitute cause for reversal.” State v. Liggins, 
    524 N.W.2d 181
    , 188
    (Iowa 1994). Simply stated, we are unable to conclude that the deputy’s very
    brief, speculative testimony that Lenz could have reached the firearm and used it
    amounted to prejudice. Based on the substantial amount of evidence of Lenz’s
    guilt, we cannot say the outcome of the trial would have been any different had
    the jury not heard this testimony. Cf. State v. Crone, 
    545 N.W.2d 267
    , 274 (Iowa
    1996).    We therefore decline to grant Lenz’s request for a new trial on this
    ground.
    III.     Constitutionality of Iowa Code section 702.18
    Next, Lenz argues Iowa Code section 702.18 is unconstitutionally vague
    as applied to him. He specifically contends the use of the term “protracted” in the
    statute renders the statute too vague to be enforced in his case. Error was not
    preserved on this argument, as Lenz did not raise it before the district court. See
    Meier v. Senecaut, 
    641 N.W.2d 532
    , 537 (Iowa 2002) (“It is a fundamental
    doctrine of appellate review that issues must ordinarily be both raised and
    decided by the district court before we will decide them on appeal.”). He also
    contends, however, that trial counsel was ineffective in failing to challenge the
    constitutionality of the statute. We must therefore consider the argument under
    an ineffective-assistance-of-counsel rubric, claims of which are not subject to our
    traditional error-preservation rules. State v. Fountain, 
    786 N.W.2d 260
    , 262–63
    (Iowa 2010).
    11
    Ineffective-assistance-of-counsel claims are reviewed de novo, as are
    challenges to the constitutionality of a statute. Diaz v. State, 
    896 N.W.2d 723
    ,
    727 (Iowa 2017) (ineffective-assistance claims); State v. Opperman, 
    826 N.W.2d 131
    , 133 (Iowa Ct. App. 2012) (constitutionality of statutes). To prevail on his
    claim of ineffective assistance of counsel, Lenz must prove, by a preponderance
    of the evidence, that (1) his counsel was deficient in failing to perform an
    essential duty and (2) prejudice resulted. Strickland v. Washington, 
    466 U.S. 668
    , 687 (1984); State v. Harris, 
    891 N.W.2d 182
    , 185 (Iowa 2017) (quoting
    State v. Straw, 
    709 N.W.2d 128
    , 133 (Iowa 2006)). In considering a claim of
    ineffective assistance of counsel, it is not necessary for a reviewing court to
    determine whether “trial counsel’s performance was deficient before examining
    the prejudice component of [the] ineffective-assistance claim.” State v. Tate, 
    710 N.W.2d 237
    , 240 (Iowa 2006); accord 
    Strickland, 466 U.S. at 697
    (“If it is easier
    to dispose of an ineffectiveness claim on the ground of lack of sufficient
    prejudice, which we expect will often be so, that course should be followed.”).
    “Prejudice is established if ‘there is a reasonable probability that, but for the
    counsel’s unprofessional errors, the result of the proceeding would have been
    different.’”   
    Harris, 891 N.W.2d at 185
    –86 (quoting State v. Reynolds, 
    746 N.W.2d 837
    , 845 (Iowa 2008)); accord 
    Strickland, 466 U.S. at 694
    . “In other
    words, a party claiming prejudice arising from ineffective assistance of counsel
    must establish a probability of a different result sufficient to undermine our
    confidence in the outcome of the case.”      
    Harris, 891 N.W.2d at 186
    .      If an
    argument to the district court would have been meritless, the claim fails. See
    
    Tompkins, 859 N.W.2d at 637
    .
    12
    Section 702.18 defines serious injury to include, among other things, any
    bodily injury which “[c]auses protracted loss or impairment of the function of any
    bodily member or organ.” As noted, Lenz argues the term “protracted” renders
    the statute unconstitutionally vague. A defendant challenging the validity of a
    criminal statute “carries the heavy burden to rebut a strong presumption of
    constitutionality.” State v. Anderson, 
    308 N.W.2d 42
    , 46 (Iowa 1981) (quoting
    State v. Sullivan, 
    298 N.W.2d 267
    , 270 (Iowa 1980)). If a criminal statute “give[s]
    a person of ordinary intelligence fair notice of what is prohibited” and “provide[s]
    an explicit standard for those who apply it,” the statute is not unconstitutionally
    vague. 
    Id. (quoting State
    v. Pierce, 
    287 N.W.2d 570
    , 573 (Iowa 1980)). “The
    specificity required of a statute need not be apparent on its face,” and courts
    “may look to prior decisions, the dictionary and common usage” in determining
    whether a statute is unconstitutionally vague. 
    Id. The word
    “protract” means “to draw out or lengthen in time or space.”
    Protract, Webster’s Third New International Dictionary 1826 (unabridged ed.
    2002). The word “extend,” which the district court used in its jury instruction
    defining serious injury, is a synonym. 
    Id. The common
    meaning of the term
    carries a similar import. See, e.g., State v. Dorrance, 
    70 A.3d 451
    , 454 (N.H.
    2013). Based on the meaning of the challenged term, we conclude the term
    “protracted” as used in the statute sufficiently notifies persons of ordinary
    intelligence that inflicting bodily injuries that cause a lengthened or extended loss
    or impairment of the function of any bodily member or organ is prohibited.
    Likewise, in requiring that the bodily injury be protracted, lengthened, or
    extended, rather than immediately ceasing upon infliction, the statute provides
    13
    the jury with an explicit standard for its application. We conclude the statute is
    not unconstitutionally vague as applied to the facts of this case.
    Lenz goes on to argue that Sonberg was “medically fixed” within three
    days of her injuries—suffering for merely three days cannot amount to a
    protracted loss or impairment—and the injury only became serious when she
    declined to follow up on her medical treatment. We, however, believe the injuries
    suffered by Sonberg and the evidence submitted in this case generated a jury
    question as to whether her loss or impairment was protracted.            Cf. State v.
    Welton, 
    300 N.W.2d 157
    , 161 (Iowa 1981); State v. Mott, 
    635 N.W.2d 301
    , 303–
    04 (Iowa Ct. App. 2001).
    Based on the facts of this case, we conclude a challenge to the
    constitutionality of Iowa Code section 702.18(1)(b)(3) would have been meritless.
    We therefore conclude Lenz’s trial counsel did not render ineffective assistance
    in failing to challenge the statute. See 
    Tompkins, 859 N.W.2d at 637
    .
    IV.    Sufficiency of the Evidence
    Next, Lenz asserts the evidence was insufficient to support a necessary
    element of the crime, that the victim suffered a serious injury or, alternatively, that
    any serious injury was a result of confinement.           The State contests error
    preservation on the alternative argument.        Because Lenz, in his motions for
    judgment of acquittal, challenged the establishment of the fourth element, which
    includes both alternatives above, we elect to bypass the State’s error-
    preservation argument and proceed to the merits. See, e.g., State v. Taylor, 
    596 N.W.2d 55
    , 56 (Iowa 1999) (bypassing an error-preservation issue and
    proceeding to the merits of the appeal).
    14
    “We review challenges to the sufficiency of evidence for correction of
    errors at law.” 
    Tipton, 897 N.W.2d at 692
    . A verdict will stand if supported by
    substantial evidence. 
    Id. “Evidence is
    substantial when a rational trier of fact
    would be convinced the defendant is guilty beyond a reasonable doubt.” 
    Id. The evidence
    is to be viewed “in the light most favorable to the State, ‘including
    legitimate inferences and presumptions that may fairly and reasonably be
    deduced from the record evidence.’” 
    Id. (quoting State
    v. Williams, 
    695 N.W.2d 23
    , 27 (Iowa 2005)). We consider all of the evidence, “not just the evidence
    supporting guilt.” 
    Id. The State
    was required to prove, among other things, that as a
    consequence of the kidnapping, Sonberg suffered a serious injury. See Iowa
    Code § 710.2; see also 
    id. § 702.18.
    The serious-injury requirement may be
    satisfied with substantial evidence that Lenz subjected Sonberg to a bodily injury
    which either (1) created a substantial risk of death, (2) caused serious permanent
    disfigurement, or (3) caused protracted loss or impairment of the function of any
    bodily member or organ. 
    Id. § 702.18(1)(b).
    Our supreme court has adopted the
    Model Penal Code’s definition of “bodily injury” which is any “physical pain,
    illness, or . . . impairment of physical condition.” State v. Gordon, 
    560 N.W.2d 4
    ,
    6 (Iowa 1997) (quoting State v. McKee, 
    312 N.W.2d 907
    , 913 (Iowa 1981)).
    In his initial interview with law enforcement, Lenz admitted to frequently
    beating Sonberg during her three-day confinement. He noted he “beat the fuck
    out of her for like two days straight” and thought the beatings “might have
    broke[n] some of her ribs and might have broke[n] her jaw too.”         Sonberg’s
    testimony generally aligned with Lenz’s concessions to law enforcement and
    15
    added that Lenz strangled her to a point that she thought she was going to die
    and threatened her with the display of a firearm on multiple occasions, hit her
    “upside the head” with it, and pressed its muzzle against her flesh. As a result of
    Lenz’s conduct toward Sonberg while he confined her, Sonberg suffered, among
    other things, a broken jaw that required reparative surgery. She also suffered a
    fracture to her hyoid bone, which is commonly caused by strangulation.
    Based on the evidence presented, the jury could have reasonably
    concluded that Lenz’s strangulation of Sonberg and frequent blows to her head
    and face during her confinement caused physical pain and created a substantial
    risk of death. The jury could have also reasonably concluded Sonberg’s injuries
    amounted to protracted losses or impairments of the function of a bodily member
    or organ, namely her jaw. Viewing the evidence in the light most favorable to the
    State, we conclude the evidence was sufficient to convince a rational trier of fact
    that Lenz was guilty of first-degree kidnapping beyond a reasonable doubt. We
    conclude the district court did not err in denying Lenz’s motions for judgment of
    acquittal.4
    V.     Jury Instructions
    Finally, Lenz argues “the court failed to instruct the jury on issues in the
    record.” He specifically contends the jury should have “been instructed on the
    defenses of diminished capacity/responsibility, intoxication, proximate cause, and
    4
    Our conclusions on this issue are also dispositive of Lenz’s final argument, raised as
    an ineffective-assistance claim, that the jury’s general verdict makes it unclear whether
    he was convicted on a valid or invalid basis. In relation to that argument, he contends
    “the [S]tate presented no evidence that any injury sustained ‘create[d] a substantial risk
    of death’” and, because it is unclear from the record whether the jury convicted him on
    this statutory alternative, he is entitled to a new trial. Because we conclude that
    alternative was supported by substantial evidence, we reject the argument.
    16
    superseding or intervening cause.” He alternatively argues “trial counsel was
    ineffective for not ensuring the instructions [were] added.”
    “Alleged errors in the submission or refusal to submit jury instructions are
    reviewed for correction of errors at law.” 
    Tipton, 897 N.W.2d at 694
    . “‘Errors in
    jury instructions are presumed prejudicial unless’ a lack of prejudice is shown
    beyond reasonable doubt.” 
    Id. (quoting State
    v. Ambrose, 
    861 N.W.2d 550
    , 554
    (Iowa 2015)). “We review jury instructions as a whole to determine whether the
    jury instructions correctly state the law.” 
    Id. Ineffective-assistance-of-counsel claims
    are reviewed de novo. 
    Diaz, 896 N.W.2d at 727
    .
    A.     Proximate Cause and Superseding or Intervening Cause
    After the close of evidence, Lenz requested the court to include “standard
    stock instruction[s] 700.3 . . . and 700.6.” The former provides, “The conduct of a
    party is a cause of damage when the damage would not have happened except
    for the conduct.”    Iowa Civ. Jury Instruction 700.3.         The latter relates to
    superseding or intervening cause and generally informs the jury that, if the
    conduct of another occurs after the conduct of the defendant and causes
    damage and the prior conduct of the defendant did not create or increase the risk
    that the victim would sustain the subsequent damage through the conduct of
    another, then the defendant is not liable. See Iowa Civ. Jury Instruction 700.6.
    Lenz premised his request for these instructions on his assertion that Sonberg’s
    failure to follow her physician’s instructions following her surgery resulted in her
    continuing impairment. The district court declined to include the instructions.
    A requested instruction must be given if it “correctly states the law, has
    application to the case, and is not stated elsewhere in the instructions.” State v.
    17
    Martinez, 
    679 N.W.2d 620
    , 623 (Iowa 2004) (quoting State v. Kellogg, 
    542 N.W.2d 514
    , 516 (Iowa 1996)). The first instruction embraces the factual-cause
    component of proximate causation: “but for the defendant’s conduct, the harm or
    damage would not have occurred.” State v. Marti, 
    290 N.W.2d 570
    , 584–85
    (Iowa 1980). The concept of but for causation was clearly included in the district
    court’s instructions to the jury. As such, we affirm the district court’s refusal to
    include a repetitive instruction concerning proximate cause.
    The second instruction relates to legal causation.          See 
    id. at 585.
    Although it is true that “[a] defendant can be relieved of criminal responsibility if
    an intervening act breaks the chain of causal connection between the
    defendant’s actions and the victim’s” injury, “the intervening act must be the sole
    proximate cause of” injury. State v. Garcia, 
    616 N.W.2d 594
    , 597 (Iowa 2000);
    accord 
    Mott, 635 N.W.2d at 303
    (noting the intervening act “must be the sole
    proximate cause of the ultimate injury” in order for the concept of superseding or
    intervening cause to be relevant).        Our supreme court has noted, “The
    intervention of a force which is a normal consequence of a situation created by
    the actor’s negligent conduct is not a superseding cause of harm which such
    conduct has been a substantial factor in bringing about.” 
    Garcia, 616 N.W.2d at 597
    (quoting State v. Murray, 
    512 N.W.2d 547
    , 551 (Iowa 1994)). Simply stated,
    Sonberg’s failure to follow her physician’s instructions following surgery was not
    the sole proximate of her injuries. Rather, Lenz was responsible for the ultimate
    injury. Cf. 
    Mott, 635 N.W.2d at 303
    . Accordingly, the concept of superseding or
    intervening cause was not applicable to the facts of this case and the district
    18
    court did not err in refusing to include the requested instruction. See 
    Martinez, 679 N.W.2d at 623
    .
    B.     Intoxication and Diminished Capacity or Responsibility
    Lenz’s did not raise intoxication or diminished capacity or responsibility as
    defenses at trial. As such, those defenses are waived. See Iowa Rs. Crim. P.
    2.11(3) (“Failure of the defendant to timely raise defenses . . . which must be
    made prior to trial under this rule shall constitute waiver thereof . . . .” (emphasis
    added)); 2.11(4) (requiring motions under rule 2.11 to be filed no later than forty
    days after arraignment); 2.11(11)(b)(1) (noting notice of diminished-responsibility
    defense is subject to time deadlines under rule 2.11); 2.11(11)(c) (noting notice
    of intoxication defense is subject to time deadlines under rule 2.11); see also
    State v. Battle, No. 12-0272, 
    2013 WL 541640
    , at *2 (Iowa Ct. App. Feb. 13,
    2013) (finding defense waived when not raised in district court).
    We are therefore left with Lenz’s argument that “trial counsel was
    ineffective for not ensuring the instructions [were] added.”         We decline to
    entertain this argument because it is contained in a single sentence tacked on to
    the end of Lenz’s analysis on this issue. Lenz provides us with no analysis,
    argument, or on-point authority concerning how his counsel was deficient in
    failing to perform an essential duty and how it resulted in prejudice to him. Under
    these circumstances, we would normally consider an argument on appeal
    waived. See Iowa R. App. P. 6.903(2)(g)(3); In re C.B., 
    611 N.W.2d 489
    , 492
    (Iowa 2000) (“A broad, all encompassing argument is insufficient to identify error
    in cases of de novo review.”); see also Hyler v. Garner, 
    548 N.W.2d 864
    , 876
    (Iowa 1996) (“[W]e will not speculate on the arguments [a party] might have
    19
    made and then search for legal authority and comb the record for facts to support
    such arguments.”); Inghram v. Dairyland Mut. Ins. Co., 
    215 N.W.2d 239
    , 240
    (Iowa 1974) (“To reach the merits of this case would require us to assume a
    partisan role and undertake the appellant’s research and advocacy. This role is
    one we refuse to assume.”).         However, when an ineffective-assistance-of-
    counsel claim is raised on direct appeal, we are required to either decide the
    record is adequate to decide the claim or choose to preserve the claim for
    postconviction-relief proceedings. State v. Johnson, 
    784 N.W.2d 192
    , 199 (Iowa
    2010) (discussing Iowa Code § 814.7(3)). On this record, we choose to preserve
    Lenz’s claim that his trial counsel was ineffective in failing to ensure the inclusion
    of the jury instructions concerning intoxication and diminished capacity or
    responsibility.
    VI.    Conclusion
    We affirm Lenz’s conviction of first-degree kidnapping in its entirety. We
    preserve for postconviction-relief proceedings Lenz’s claim that his trial counsel
    was ineffective in failing to ensure the inclusion of the jury instructions concerning
    intoxication and diminished capacity or responsibility.
    AFFIRMED.