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, Dorondis and Damean, were involved either as members or associates of The Hood. After the fight, Carl, Dorondis, 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.
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 *773 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. Doron-dis 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 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,
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 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,
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-ineluded 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
*775 MR. STANDAFER: That’s what I have a problem with.
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 codefen-dant, 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 co-counsel 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.
III. Mutual-Combat Instruction.
A. Scope of Review. “[W]e review challenges to jury instructions for correction of errors at law.”
Anderson,
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 *776 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 eviden-tiary facts. The latter objection was not raised at trial and cannot be asserted for the first time on appeal.
See State v. Sanborn,
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,
We think the trial court’s definition of the term “mutual combat” was consistent with these authorities: “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.” 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 *777 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,
For example, in
Roy,
the defendants were convicted of second-degree murder stemming from an incident in which they “opened fire on one another on a public street, resulting in the death of an innocent bystander.”
[ojther 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.”
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.
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
*778
whose gun fired the fatal bullet, regardless of whether the shooter and the defendant were on the same side.
See, e.g., Alston,
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,
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.
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,
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.
*779
Id.
at 346,
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 Sul-grove and a passenger in the third vehicle.
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,
[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.
*780 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,
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].
(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,
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 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.
Notes
. The prosecution tried the case on the theory that Carl shot the fatal bullet, and the defendant aided and abetted him.
. We recently stated in dicta in
In re Z.S.,
. If 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,
. In
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.
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.
. The 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,
. Anticipating 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,
