State Of Iowa Vs. Christopher Deangelo Spates ( 2010 )


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  •                    IN THE SUPREME COURT OF IOWA
    No. 05–0883
    Filed March 19, 2010
    STATE OF IOWA,
    Appellee,
    vs.
    CHRISTOPHER DEANGELO SPATES,
    Appellant.
    On review from the Iowa Court of Appeals.
    Appeal from the Iowa District Court for Black Hawk County, Jon C.
    Fister, Judge.
    Alleging instructional error, defendant seeks further review of court of
    appeals’ decision affirming defendant’s first-degree murder conviction.
    DECISION OF COURT OF APPEALS VACATED IN PART; DISTRICT
    COURT JUDGMENT AFFIRMED.
    Clemens A. Erdahl, Eric D. Tindal, and Sara L. Smith of Nidey
    Peterson Erdahl & Tindal, PLC, Cedar Rapids, for appellant.
    Thomas J. Miller, Attorney General, Richard J. Bennett, Assistant
    Attorney General, Thomas J. Ferguson, County Attorney, and Joel Dalrymple
    and D. Raymond Walton, Assistant County Attorneys, for appellee.
    2
    TERNUS, Chief Justice.
    The appellant, Christopher Spates, was convicted of first-degree felony
    murder for the killing of a bystander during a gun battle between rival
    groups in Waterloo, Iowa. Spates raised several issues on appeal, but they
    were all rejected by the Iowa Court of Appeals.      This court subsequently
    granted his application for further review for purposes of considering two
    allegations of trial court error:   (1) the failure to give an instruction on
    voluntary manslaughter and (2) the submission of a “mutual combat”
    instruction.
    We conclude error was not preserved on the trial court’s decision not
    to submit voluntary manslaughter as a lesser-included offense of first-degree
    murder. In addition, we hold the trial court did not err in instructing on the
    theory of mutual combat as a basis for the defendant’s culpability as an
    aider and abettor. We vacate that portion of the court of appeals’ decision
    addressing the defendant’s allegations of instructional error and affirm the
    district court’s judgment of conviction and sentence.
    I. Background Facts and Proceedings.
    In the early morning hours of October 10, 2004, a fight occurred
    between two rival groups, the “L-Block” and “The Hood,” in the parking lot of
    a Waterloo bar. Although the defendant was not present at this fight, several
    members of his extended family, including his brother, Carl, and cousins,
    Dornodis and Damean, were involved either as members or associates of The
    Hood.     After the fight, Carl, Dornodis, Damean, and three other Hood
    members or associates, who had been at the bar fight, drove to the house
    where the mother of the defendant and Carl lived. The men were angry and
    decided to “go find” the L-Block members.      Carl went into the house and
    returned with an assault rifle.
    3
    The group then proceeded to Damean’s house where they met up with
    the defendant who was driving his mother’s GMC Yukon Denali, which he
    was purchasing from her. The defendant agreed to join in the effort to find
    the L-Block group. They knew L-Block members sometimes hung out at 130
    Harrison Street, so they proceeded to that location, a third car joining them
    en route. This caravan of cars was captured on video by a police officer who
    happened to have his camera turned on during an unrelated traffic stop. A
    trial expert testified that the vehicles shown on this video were consistent
    with the three cars driven to 130 Harrison, including the defendant’s Denali.
    Seeing a number of persons outside 130 Harrison, the group parked
    their vehicles a block away and proceeded on foot to 137 Harrison, an area
    across the street from 130 Harrison. According to testimony of witnesses at
    trial, the defendant had a shotgun, his brother had the assault rifle, and
    other members of the group had additional weapons. Although there was
    conflicting evidence about who fired the first shot, it is undisputed that shots
    were fired by the defendant’s group. Numerous casings were found at the
    scene, including evidence that two shotguns had been fired.         During the
    gunfire, a woman in the kitchen of 130 Harrison was killed.            Ballistic
    evidence confirmed the bullet that struck this bystander was shot by an
    assault rifle, but the bullet could not be linked to any specific weapon.
    After the shooting, the individuals in the defendant’s group fled the
    scene.   Dorondis had been shot in the shoulder.         Accomplice testimony
    indicated the defendant took Dorondis to a nearby hospital, and DNA
    evidence confirmed that blood found in the Denali belonged to Dorondis.
    Twelve days later, the defendant, his brother, Carl, and his cousins,
    Dorondis and Damean, were charged with first-degree felony murder. The
    trial information alleged the defendants killed the victim while participating
    in a forcible felony. See Iowa Code § 707.2 (2003). The defendant pled not
    4
    guilty. In exchange for testifying against the defendant and Carl, Dorondis
    and Damean entered into plea agreements pleading guilty to unspecified
    crimes with an aggregate term of twenty-five years.
    The charges against the defendant and his brother were jointly tried to
    a jury. The first-degree murder charge was submitted under felony-murder
    instructions allowing the jury to find either defendant guilty as a principal or
    as an aider and abettor. 1 The predicate forcible felonies were those listed in
    the information: intimidation with a dangerous weapon or assault causing
    serious injury. The jury was also instructed on the lesser-included offenses
    of second-degree murder and involuntary manslaughter, but returned a
    guilty verdict on the first-degree murder charge. The defendant’s posttrial
    motions were denied, and he was sentenced to life in prison.
    The defendant’s subsequent appeal was transferred to the court of
    appeals.      That court affirmed the defendant’s conviction and judgment of
    sentence.      We granted the defendant’s application for further review to
    consider two issues: (1) whether the district court erred in failing to instruct
    on the lesser-included offense of voluntary manslaughter and (2) whether the
    district court erred in giving an instruction on the subject of “mutual
    combat.”      See Anderson v. State, 
    692 N.W.2d 360
    , 363 (Iowa 2005) (“On
    further review, we can review any or all of the issues raised on appeal or
    limit our review to just those issues brought to our attention by the
    application for further review.”).
    II. Voluntary Manslaughter Instruction.
    On appeal, the defendant asserts the trial court erred in failing to
    instruct the jury on voluntary manslaughter as a lesser-included offense of
    1The prosecution tried the case on the theory that Carl shot the fatal bullet, and the
    defendant aided and abetted him.
    5
    first-degree felony murder. The State claims the defendant failed to preserve
    error on this issue.
    Iowa Rule of Criminal Procedure 2.6(3) requires the trial court to
    instruct on lesser-included offenses, “even though such instructions have
    not been requested.” Notwithstanding the trial court’s duty in this regard,
    we have a long-standing requirement that, to preserve error on a trial court’s
    failure to instruct on a lesser-included offense, “a defendant must request a
    lesser-included offense instruction or object to the court’s failure to give it.”
    State v. Jeffries, 
    430 N.W.2d 728
    , 737 (Iowa 1988); accord State v. Wallace,
    
    475 N.W.2d 197
    , 202 (Iowa 1991); cf. State v. Ondayog, 
    722 N.W.2d 778
    ,
    785 (Iowa 2006) (requiring defendant to object to trial court’s instruction on
    lesser-included offense to preserve error). A corollary of this requirement is
    the rule that “a defendant may expressly waive a lesser-included offense
    instruction.” 
    Jeffries, 430 N.W.2d at 737
    ; accord State v. Greer, 
    439 N.W.2d 198
    , 200 (Iowa 1989). Even when a defendant waives submission of lesser-
    included offenses, the State retains the right to demand submission of a
    lesser offense.      See 
    Greer, 439 N.W.2d at 200
    .                In Greer, this court
    recognized that the State may also have “a legitimate interest in having a
    lesser-included offense . . . submitted to the jury,” and therefore, the
    defendant does not have “veto power . . . to block submission of any lesser-
    included offense which the accused does not fancy.” 
    Id. 2 2We
      recently stated in dicta in In re Z.S., 
    776 N.W.2d 290
    (Iowa 2009), that Iowa
    follows the “trial integrity” model in determining whether a lesser-included offense
    instruction should be given to the jury. In re 
    Z.S., 776 N.W.2d at 295
    . Under this model,
    the trial judge must give an instruction “on any lesser-included offense supported by the
    evidence, even if neither party requests one. . . . This analytical model does not permit the
    parties to adopt an all-or-nothing trial strategy.” State v. Cox, 
    851 A.2d 1269
    , 1272 (Del.
    2003). As the Iowa cases demonstrate, we give the parties some autonomy to determine
    whether a lesser-included offense is submitted to the jury. If both the defense and the
    prosecution agree that a lesser-included-offense instruction should not be given, the trial
    judge does not commit error in failing to instruct on the lesser-included offense. To the
    extent In re Z.S. implies a different rule, we disavow it.
    6
    The record reveals the trial court submitted its proposed instructions
    to the county attorney and to the attorneys for the defendant and his
    brother, Carl, before final arguments. These instructions did not include an
    instruction on voluntary manslaughter. The trial court specifically directed
    the attorneys’ attention to the subject of lesser-included offenses.                      The
    county attorney, Mr. Ferguson, stated that murder in the second degree and
    involuntary manslaughter should be submitted.                     The court then asked
    Mr. Standafer and Mr. Bevel, the defendant’s attorneys, for their response.
    The following discussion ensued:
    MR. BEVEL: Well I think we would just––we would ask
    voluntary manslaughter––
    (Discussion was had between Mr. Bevel and Mr. Rauch.)
    MR. STANDAFER: Judge, this is one of them unique
    situations, I guess it happens sometimes, but as co-counsel I
    think Mr. –– I just got to be honest with the Court, Mr. Bevel and
    I disagree. I don’t think it’s appropriate to submit––and I think I
    addressed this to the Court earlier––I don’t think it’s appropriate
    to submit voluntary manslaughter in this case.
    THE COURT: Okay.
    MR. FERGUSON: Just so the record is clear, Your Honor,
    voluntary manslaughter is a lesser included under a legal
    theory, but it would not be under the facts as submitted, the
    evidence in this case–– 3
    MR. STANDAFER: That’s what I have a problem with.
    3If  an offense is legally included within the charged offense and there is a factual
    basis for submission of the lesser offense, the court may properly submit the lesser offense
    to the jury. State v. Ware, 
    338 N.W.2d 707
    , 714 (Iowa 1983). Under our legal-elements test
    for lesser-included offenses, the lesser offense must “ ‘be composed . . . of some but not all
    of the elements of the greater offense[].’ ” 
    Jeffries, 430 N.W.2d at 736
    (quoting State v.
    Lampman, 
    345 N.W.2d 142
    , 143 (Iowa 1984)). Logically, then, if the lesser offense meets the
    legal-elements test and there is a factual basis for the greater offense, the lesser offense
    automatically meets the factual test. 
    Id. The factual
    test is not automatically met, however,
    when a crime that does not meet the legal-elements test is made a lesser-included offense by
    statute. 
    Id. at 737.
    In those instances, the trial court must separately “determine if
    sufficient evidence exists to submit [the] statutorily mandated lesser-included offense[].” 
    Id. By statute,
    voluntary manslaughter is an included offense of felony murder. See Iowa Code
    § 707.4; 
    Jeffries, 430 N.W.2d at 737
    . Therefore, it was necessary for the trial court to find
    substantial evidence in the record supporting the elements of this crime before it was
    required to submit this lesser-included offense to the jury.
    7
    THE COURT:         Okay.     That’s your               position   and
    Mr. Ferguson’s position. Mr. Bevel thinks––
    MR. BEVEL: Well I’ll—I’ll––
    MR. STANDAFER: I think Mr. Ferguson is correct. And––
    and for strategic––I’ll just say for the record on behalf of my
    client, for strategic reasons, also, and based on the facts, I don’t
    think it’s in my client’s best interest to submit voluntary
    manslaughter.
    At that point, the attorneys for codefendant, Carl Spates, requested that
    voluntary manslaughter be included in the court’s instructions, claiming it
    was a lesser-included offense of first-degree murder and there was
    substantial evidence to support its submission. The trial court ultimately
    determined there was not a factual basis for this offense and did not submit
    voluntary manslaughter to the jury.
    We do not think the defendant preserved error on this issue. The only
    position   articulated   to   the   court       on   behalf   of   the   defendant   was
    Mr. Standafer’s opinion that an instruction on voluntary manslaughter was
    not supported by the evidence and was not desirable for strategic reasons.
    Although the trial court was aware there was a disagreement between the
    defendant’s attorneys with respect to whether it was in the defendant’s
    interest to have an instruction on this lesser-included offense, it clearly
    appeared that Mr. Standafer’s position prevailed as between the defendant’s
    counsel. The fact that cocounsel harbored doubts about the chosen strategy
    is not sufficient to preserve error in the face of the express waiver made by
    Mr. Standafer on the defendant’s behalf.
    The court of appeals addressed the merits of the defendant’s claim
    that an instruction on voluntary manslaughter should have been given.
    Because the defendant did not preserve error on this issue, we vacate that
    part of the court of appeals’ decision holding the trial court did not err in
    refusing to submit voluntary manslaughter as a lesser-included offense.
    8
    III. Mutual-Combat Instruction.
    A. Scope of Review. “[W]e review challenges to jury instructions for
    correction of errors at law.” 
    Anderson, 692 N.W.2d at 363
    . Our review is to
    determine whether the challenged instruction accurately states the law and
    is supported by substantial evidence. State v. Predka, 
    555 N.W.2d 202
    , 204
    (Iowa 1996).   Error in giving a particular instruction does not warrant
    reversal unless the error was prejudicial to the party. Thavenet v. Davis, 
    589 N.W.2d 233
    , 236 (Iowa 1999).
    B. Instruction and Objection. At trial the court instructed the jury
    as follows:
    If you find that either of the defendants, or any person or
    persons that either of the defendants was acting together with,
    were voluntarily engaged in mutual combat by shooting guns at
    each other and that, by exchanging gunfire, they jointly created
    a zone of danger likely to result in the death or injury of
    innocent bystanders, then you may also find that each of the
    combatants, including the defendant, aided and abetted each of
    the other combatants and it makes no difference which of the
    combatants fired the first shot or which of the combatants fired
    the shot which struck and killed [the victim].
    To constitute “mutual combat” there must exist a mutual
    intent and willingness to fight and this intent may be manifested
    by the acts and conduct of the parties and the circumstances
    attending and leading up to the combat.
    The defendant objected to this instruction at trial on the basis that a
    defendant could not be held liable as an aider and abettor under a theory of
    mutual combat when the prosecution could not prove who fired the shot that
    killed the innocent bystander.     On appeal, the defendant renews this
    objection and also argues the instruction gave undue prominence to certain
    evidentiary facts. The latter objection was not raised at trial and cannot be
    asserted for the first time on appeal. See State v. Sanborn, 
    564 N.W.2d 813
    ,
    815 (Iowa 1997) (“A defendant may not rest an objection on one ground at
    trial, and rely on another for reversal on appeal.”). Therefore, we consider
    9
    only whether the challenged instruction was properly given under the facts
    of this case.
    C. Definition of “Mutual Combat.”                   Before we can determine
    whether the record supported a mutual-combat instruction, we must
    establish what is meant by “mutual combat.”                  From our review of the
    authorities, we conclude “mutual combat” is more than “a reciprocal
    exchange of blows.” People v. Ross, 
    66 Cal. Rptr. 3d 438
    , 447 (Cal. Ct. App.
    2007). It requires “a mutual intention, consent, or agreement preceding the
    initiation of hostilities.” 
    Id. (emphasis omitted);
    see also Sanders v. State,
    
    659 S.E.2d 376
    , 380 (Ga. 2008) (“A charge on mutual combat ‘is warranted
    only when the combatants are armed with deadly weapons and mutually
    agree to fight.’ ” (quoting Hudson v. State, 
    623 S.E.2d 497
    , 498 (Ga. 2005)).
    Thus, an express or tacit agreement to engage in violence, while sufficient, is
    not required; it is enough that “there was a concurrent or mutual
    expectation that a street battle would ensue.” Roy v. United States, 
    871 A.2d 498
    , 508 (D.C. Ct. App. 2005); accord Alston v. State, 
    662 A.2d 247
    , 254
    (Md. 1995). 4
    We think the trial court’s definition of the term “mutual combat” was
    consistent with these authorities: “To constitute ‘mutual combat’ there must
    4In Roy, the court held that proof the defendant was “armed and prepared to engage
    in gun battle” was “the functional equivalent” of “a concurrent or mutual expectation” of
    armed 
    violence. 871 A.2d at 507
    –08. In Alston, the court acknowledged there was no
    express agreement to engage in a gun battle, but concluded the jury
    had sufficient evidence from which it could find that all of the participants,
    driven by an unwritten code of macho honor, tacitly agreed that there would
    be mutual combat. The conclusion is supported by the evidence that the
    trouble began on Sunday, that following the events of Monday, Hall [a
    member of the defendant’s gang] found it necessary to go about armed, that
    D Nice [a member of the rival gang] fatalistically observed that more people
    would be hurt, and that the [defendant’s] group used the vicinity of Robert
    and Brunt Sts. as a staging area for the impending 
    battle. 662 A.2d at 254
    .
    10
    exist a mutual intent and willingness to fight and this intent may be
    manifested by the acts and conduct of the parties and the circumstances
    attending and leading up to the combat.” We next examine how this concept
    relates to a defendant’s criminal liability for the death of an innocent
    bystander.
    D. Relevancy of Mutual-Combat Situation. In other jurisdictions, a
    defendant’s participation in mutual combat has been employed to assist in
    proving the defendant’s responsibility for the death of an innocent bystander
    even when the defendant’s act was not the direct cause of the bystander’s
    death.   Criminal responsibility in these cases has rested on one of two
    theories: (1) the defendant’s conduct is a proximate cause of the bystander’s
    death, so the defendant is liable as a principal; or (2) the defendant’s
    participation in the combat encouraged the murderous acts so as to make
    the defendant liable as an aider and abettor of the actual killer. It is helpful
    to review some of these cases before we analyze whether the instruction
    given in this case was proper.
    1. Proximate cause liability.    In some cases, the fact that various
    individuals were engaged in a gun battle has been used to establish that
    conduct of a defendant, who was not proved to have fired the fatal shot, was
    still a proximate cause of an innocent bystander’s death. See, e.g., People v.
    Sanchez, 
    29 P.3d 209
    , 219–20 (Cal. 2001) (first-degree murder); 
    Roy, 871 A.2d at 508
    (second-degree murder); Phillips v. Commonwealth, 
    17 S.W.3d 870
    , 875 (Ky. 2000) (wanton murder); Commonwealth v. Santiago, 
    681 N.E.2d 1205
    , 1215 (Mass. 1997) (first-degree murder). In these cases, the
    defendant was held criminally responsible as a principal on the basis of his
    own conduct.
    For example, in Roy, the defendants were convicted of second-degree
    murder stemming from an incident in which they “opened fire on one
    11
    another on a public street, resulting in the death of an innocent 
    bystander.” 871 A.2d at 501
    –02. The appeals court found no error in the trial court’s
    instruction on causation, which required proof that the defendant’s conduct
    was a substantial factor in the bystander’s death, but not that the defendant
    fired the fatal shot. 
    Id. at 506–07.
    The court noted,
    [o]ther jurisdictions have extended proximate cause liability to
    participants in gun battles, finding that an individual’s
    participation in such a battle represents a depraved indifference
    to human life such that he or she meets the mens rea for
    second-degree depraved heart murder. Further, courts have
    determined that the combined hail of bullets that result from
    such a battle are jointly responsible for the fatal injury, such
    that a determination of which defendant’s bullet “actually”
    caused the death is unnecessary. Finally, courts have found
    that a death which results from the shower of bullets created
    during this type of battle is more than reasonably foreseeable,
    i.e., conscious awareness of danger.
    
    Id. at 507
    n.10. 5
    In the Santiago case, the Massachusetts court concluded the
    defendant could be found guilty of first-degree murder even if the
    prosecution could not prove that “he fired the fatal 
    shot.” 681 N.E.2d at 1214
    . Noting “[t]he defendant’s acts need not be the sole or exclusive cause
    of death,” the court held:
    By choosing to engage in a shootout, a defendant may be the
    cause of a shooting by either side because the death of a
    bystander is a natural result of a shootout, and the shootout
    could not occur without participation from both sides.
    
    Id. at 1215.
    5The     District of Columbia court approved an instruction on “proximate cause
    liability” for second-degree murder that required the prosecution to prove: (1) the defendant
    “was armed and prepared to engage in a gun battle”; (2) “the defendant did, in fact, engage
    in a gun battle” at the time and place alleged; (3) “the defendant did not act in self-defense”;
    (4) the defendant’s conduct “was a substantial factor” in the bystander’s death; and (5) “it
    was reasonably foreseeable that death or serious injury to innocent bystanders could occur
    as a result of the defendant’s conduct.” 
    Roy, 871 A.2d at 506
    –07 n.8.
    12
    2. Liability as an aider and abettor. A similar result has been reached
    under the theory that a person who engages in mutual combat aids and
    abets the person whose gun fired the fatal bullet, regardless of whether the
    shooter and the defendant were on the same side. See, e.g., 
    Alston, 662 A.2d at 252
    ; People v. Russell, 
    693 N.E.2d 193
    , 195 (N.Y. 1998); cf. State v. Garza,
    
    916 P.2d 9
    , 15 (Kan. 1996) (holding defendant could be held liable as an
    aider and abettor for his opposing combatant’s injury of an innocent
    bystander struck by a stray bullet). For example, in Alston, the Maryland
    court affirmed a second-degree murder conviction of a participant in a gun
    battle, despite proof that the innocent bystander was shot by a member of
    the rival 
    gang. 662 A.2d at 247
    –48.      The court rejected the defendant’s
    argument that he could not be found to have aided and abetted the killer
    because they were adversaries in the gun battle, stating:
    Each participant, prior to the actual combat, was willing to use
    lethal force when the opposing groups met. Each participant
    manifested depraved heart malice toward non-combatants when
    the two groups met and sought to kill each other as they
    previously had determined to do. There would have been no
    mutual combat, and no murder of an innocent person, but for
    the willingness of both groups to turn an urban setting into a
    battleground. In this sense each participant is present, aiding
    and abetting each other participant, whether friend or foe, in the
    depraved conduct.
    
    Id. at 252;
    accord Reyes v. State, 
    783 So. 2d 1129
    , 1132–33 (Fla. Dist. Ct.
    App. 2001) (holding “each participant in a mutually agreed-to-gun battle in a
    public place may be held accountable for any death or injury to an innocent
    person which results from that confrontation”).
    Similarly, in Russell, the defendant’s second-degree murder conviction
    was upheld even though it could not be established who shot the stray bullet
    that killed an innocent 
    bystander. 693 N.E.2d at 194
    . Finding “there was
    adequate proof . . . that the three defendants tacitly agreed to engage in the
    gun battle that placed the life of any innocent bystander at grave risk,” 
    id. at 13
    195, the court concluded there was adequate proof that all three defendants
    acted with the requisite mental culpability “and that they intentionally aided
    and encouraged each other to create the lethal crossfire that caused the
    death of [the victim],” 
    id. at 196.
    E. Relevant Iowa Cases.         Our court has not had the occasion to
    consider the criminal liability of mutual combatants for injury to an innocent
    bystander.    We have, however, addressed criminal responsibility in an
    analogous situation––drag racing. See State v. McFadden, 
    320 N.W.2d 608
    (Iowa 1982); State v. Youngblut, 
    257 Iowa 343
    , 
    132 N.W.2d 486
    (1965). In
    Youngblut, the defendant and another driver were drag racing in the streets
    of Waterloo, Iowa, when the other driver struck a third vehicle, causing the
    death of a passenger in the third 
    vehicle. 257 Iowa at 345
    –46, 132 N.W.2d
    at 487. A charge of manslaughter against the defendant was dismissed by
    the district court. 
    Id. at 344,
    132 N.W.2d at 486. The defendant sought to
    uphold the dismissal on the state’s appeal, arguing the minutes of testimony
    did not charge a crime because “they do not state decedent’s death was
    caused by an unlawful act of defendant” insofar as there was no contact
    between the defendant’s car and the third party’s vehicle. 
    Id. at 344–45,
    132
    N.W.2d at 486. This court reversed, holding:
    A defendant may be found guilty of manslaughter by entering
    into an agreement to conduct an automobile race on a city street
    and doing so in a reckless manner, with wanton disregard for
    the safety of others, from which the death of another results.
    
    Id. at 346,
    132 N.W.2d at 487. We relied on a California case in which the
    court had held that the acts of both drivers in a drag race “ ‘led directly to
    and were a proximate cause of [an innocent person’s death].’ ” 
    Id. at 347,
    132 N.W.2d at 488 (quoting People v. Kemp, 
    310 P.2d 680
    , 683 (Cal. Ct. App.
    1957)).
    14
    In McFadden, the defendant was a participant in a drag race that
    became deadly when the vehicle driven by his opponent, Sulgrove, hit a third
    vehicle, killing Sulgrove and a passenger in the third 
    vehicle. 320 N.W.2d at 609
    –10.     The defendant was convicted of two counts of involuntary
    manslaughter.       
    Id. at 610.
         With respect to the innocent victim, the
    defendant was found guilty as a principal and under theories of vicarious
    liability––aiding   and   abetting    and   joint   criminal   conduct––based    on
    Sulgrove’s commission of involuntary manslaughter.             
    Id. The defendant’s
    responsibility for Sulgrove’s death could not be sustained under a vicarious
    liability theory, however, because Sulgrove could not be guilty of involuntary
    manslaughter with respect to his own death.           
    Id. (noting “the
    involuntary
    manslaughter statute requires proof that the perpetrator caused the death of
    ‘another person’ ” (quoting Iowa Code § 707.5(1))). Consequently, on appeal
    this court focused its discussion on whether the defendant was liable as a
    principal for involuntary manslaughter, specifically whether “defendant’s
    reckless commission of the public offense of drag racing was a proximate
    cause of the [two] deaths.” 
    Id. We concluded
    there was sufficient evidence
    from which the fact finder could find that, “ ‘but for the defendant’s conduct,
    the harm or damage would not have occurred.’ ” 
    Id. at 615
    (quoting State v.
    Marti, 
    290 N.W.2d 570
    , 584–85 (Iowa 1980)); see also 
    Marti, 290 N.W.2d at 579
    (“It is not essential for conviction in all cases that the accused actively
    participate in the immediate physical impetus of death.”).
    Relying on the causation analysis of McFadden and Marti, the Iowa
    Court of Appeals has affirmed a second-degree murder conviction of a
    participant in a gun battle even though the fatal bullet that hit an innocent
    bystander was fired by the defendant’s opponent.               State v. Brown, 
    589 N.W.2d 69
    , 72 (Iowa Ct. App. 1998), overruled on other grounds by State v.
    Reeves, 
    636 N.W.2d 22
    , 26 (Iowa 2001). The defendant in Brown claimed on
    15
    appeal that there was insufficient proof that his conduct was a proximate
    cause of the bystander’s death. 
    Id. at 74.
    The court of appeals rejected this
    contention:
    [The defendant’s] engagement in conduct that created a
    very high risk of death or serious bodily injury to others was a
    proximate cause of [the bystander’s] death. This is true whether
    it was the defendant or another participant in the shoot-out who
    fired the shot that killed the innocent bystander.
    
    Id. at 74–75
    (citations omitted).   The court also held “that if death to an
    innocent bystander ensues from gang-style gunplay in a crowded urban
    area, each participant in the lethal encounter has exhibited malice.” 
    Id. at 75.
    Therefore, the court concluded, “[t]he State presented sufficient evidence
    of malice aforethought by showing [the defendant’s] intent to cause someone
    bodily harm immediately before [the bystander’s] death.” 
    Id. Our cases
    support a conclusion that the acts of a defendant engaged
    in mutual combat can be the proximate cause of injury to an innocent
    bystander that directly results from the act of another combatant. Provided
    the defendant possesses the requisite mens rea for the crime charged, he can
    be held liable as a principal.   We think the same participation in mutual
    combat can also provide a basis to hold the defendant responsible as an
    aider and abettor under Iowa law.
    To sustain a conviction on the theory of aiding and
    abetting, the record must contain substantial evidence the
    accused assented to or lent countenance and approval to the
    criminal act either by active participation or by some manner
    encouraging it prior to or at the time of its commission.
    State v. Tangie, 
    616 N.W.2d 564
    , 574 (Iowa 2000).       We agree with those
    courts that have concluded participants in mutual combat encourage each
    other to engage in the potentially lethal conduct that leads to the injury of
    innocent bystanders, thereby supporting liability as an aider and abettor.
    16
    F. Propriety of Mutual-Combat Instruction.         The mutual-combat
    instruction given by the trial court in this case was very narrow, addressing
    only one element of the first-degree murder charge.          The marshaling
    instruction of the court on this charge contained two alternatives, one based
    on principal liability and one based on a theory of aiding and abetting. The
    first alternative required that the jury find (1) the defendant shot the
    bystander, (2) the bystander died as a result of being shot, (3) the defendant
    acted with malice aforethought, and (4) the defendant was participating in
    one of the specified forcible felonies. The second alternative required proof
    that (1) “some person” shot the bystander, (2) the bystander died as a result
    of being shot, (3) the person who shot the bystander acted with malice
    aforethought, (4) the person who shot the bystander was participating in one
    of the specified forcible felonies, and (5) the defendant either aided and
    abetted the shooter or acted together with the shooter.        The jury was
    instructed that “ ‘[a]id and abet’ means to knowingly approve and agree to
    the commission of a crime, either by active participation in it or by
    knowingly advising or encouraging the act in some way before or when it is
    committed.”
    The court’s instruction on mutual combat addressed only the fifth
    element of the second alternative: the defendant’s act of aiding and abetting.
    The instruction provided:
    If you find that either of the defendants, or any person or
    persons that either of the defendants was acting together with,
    were voluntarily engaged in mutual combat by shooting guns at
    each other and that, by exchanging gunfire, they jointly created
    a zone of danger likely to result in the death or injury of
    innocent bystanders, then you may also find that each of the
    combatants, including the defendant, aided and abetted each of
    the other combatants and it makes no difference which of the
    combatants fired the first shot or which of the combatants fired
    the shot which struck and killed [the victim].
    17
    (Emphasis added.) The court did not instruct on mutual combat as a basis
    for proximate cause liability as a principal, nor as a basis to prove the
    required mens rea for first-degree murder. Therefore, the issue presented in
    this case, as framed by the defendant’s objection, is simply whether a
    defendant engaged in mutual combat may be held to have aided and abetted
    a cocombatant when the identity of the murderer cannot be established.
    We first note the general principle that it is not necessary for the
    prosecution to prove the identity of the murderer to establish that a
    defendant “aided or abetted the murderer or engaged in joint criminal
    conduct with him.”   State v. Kern, 
    307 N.W.2d 29
    , 30 (Iowa 1981).       The
    prosecution must simply prove that the murderer was one of the persons
    whom the defendant aided and abetted. 
    Id. We think
    the same principles
    hold true when aiding-and-abetting liability is imposed on a mutual
    combatant.    The primary distinction between garden-variety aiding and
    abetting and mutual-combat aiding and abetting is that the existence of
    mutual combat provides a factual basis for holding a defendant combatant
    vicariously liable for the murderous conduct of any other combatant, even
    an opponent of the defendant.    We find no basis in this distinction that
    would warrant a different rule with respect to the necessity of establishing
    the identity of the murderer.   So long as the murderer is shown to be
    another participant in the mutual combat, the necessary factual link
    between the defendant’s aiding and abetting and the actual murder is
    present.   Therefore, we hold a mutual-combat instruction on aiding and
    abetting is appropriate even when the identity of the murderer cannot be
    shown.
    Here, the jury was instructed that, if the defendant was engaged in
    mutual combat, the jury could find that he aided and abetted every other
    combatant.   The marshaling instruction required that the State prove the
    18
    defendant aided and abetted the person who shot the bystander. Therefore,
    before the jury could have found the defendant guilty as an aider and abettor
    under the mutual-combat instruction, it would have to find that the shooter
    was one of the combatants.            Our review of the record shows there was
    substantial evidence that the fatal shot came from one of the persons
    engaged in the shootout, even though the identity of everyone involved could
    not be ascertained. We conclude, therefore, that the trial court did not err in
    giving a mutual-combat instruction notwithstanding the State’s inability to
    prove the identity of the shooter. 6
    IV. Disposition.
    The defendant did not preserve error on the trial court’s failure to
    submit the lesser-included offense of voluntary manslaughter.                      The trial
    court did not err in instructing on mutual combat as a basis for aider-and-
    abettor liability. We vacate the court of appeals’ decision only with respect to
    its discussion of the alleged instructional errors and affirm the defendant’s
    conviction and sentence.
    DECISION OF COURT OF APPEALS VACATED IN PART; DISTRICT
    COURT JUDGMENT AFFIRMED.
    All justices concur except Baker, J., who takes no part.
    6Anticipating that our conclusion there is no merit to the challenge made in this case
    to the mutual-combat instruction may prompt trial courts to use the same instruction given
    in this case in future trials, we caution that the instruction at issue here may not be free
    from error. The instruction given in this case allows a finding of aiding and abetting if
    “either of the defendants, or any person or persons that either of the defendants was acting
    together with, were voluntarily engaged in mutual combat.” (Emphasis added.) But for
    aiding-and-abetting liability, the defendant himself must “ ‘knowingly approve[] and agree[]
    to the commission of a crime, either by active participation in it or by knowingly advising or
    encouraging the act in some way before or when it is committed.’ ” State v. Allen, 
    633 N.W.2d 752
    , 754 (Iowa 2001) (emphasis added) (quoting I Iowa Crim. Jury Instruction 200.8
    (1998)). Arguably, the focus of the instruction given by the court in this case is too broad,
    and the instruction should require that the defendant himself be engaged in mutual combat
    before he can be held to have aided and abetted other combatants.