OPINION
¶ 1 This case is before us now for a fourth time on James Granvil Wallace’s automatic appeal from two death sentences.
See State v. Wallace (Wallace III),
I.
¶ 2 In early 1984, Wallace was living with his girlfriend, Susan Insalaeo, and her two children, sixteen-year-old Anna and twelve-year-old Gabriel. When Wallace came home drunk on January 31,1984, Susan told him to move out. The next day, Susan went to work, and Anna and Gabriel left for school while Wallace stayed home.
¶ 3 When Anna returned from school, Wallace was hiding behind the front door with a small wooden baseball bat. He struck Anna in the head with the bat from behind. She fell to the ground but continued breathing and moaning. Wallace struck her in the head at least ten times, eventually breaking the bat, but Anna was still alive. Wallace dragged her into the bathroom and drove the broken bat into her throat.
¶4 After killing Anna, Wallace found an 18-inch pipe wrench and decided to use it to kill Gabriel because he “didn’t want him to suffer like [Anna].” Gabriel arrived home shortly thereafter and walked into his bedroom. Wallace followed and hit Gabriel in the head with the piрe wrench. Gabriel fell to the floor, and Wallace hit him in the head approximately ten more times until he had “crushed his skull.”
¶ 5 When Susan arrived home from work a couple hours later, Wallace hit her in the head with the pipe wrench. She fell, and Wallace hit her several more times, ultimately killing her. Wallace reported the crimes to the police the next day. After waiving his Miranda rights, he confessed in detail to the murders but could not explain why he committed them.
¶ 6 Wallace pleaded guilty and was sentenced to death by the trial judge for all three murders. After this Court twice affirmed the convictions and death sentences on appeal, see Wallace I; Wallace II, the federal district court granted habeas corpus relief and ordered a new sentencing trial. That retrial before a jury in 2005 again re- *158 suited in the imposition of three death sentences. 2
¶ 7 In 2008, we reduced the death sentence for Susan’s murder to life in prison because the evidence was insufficient to prove an aggravating circumstance as to that murder.
Wallace III,
II.
¶8 Because the murders occurred before August 1, 2002, this Court independently reviews the aggravation and mitigation findings, as well as the propriety of the death sentences.
See
A.R.S. § 13-755(A). In independent review, “we do not defer to the findings or decision of the jury, with respect to aggravation or mitigation, when determining the propriety of the death sentence.”
State v. Newell,
¶ 9 The sole aggravating circumstance here, heinousness or depravity of the murders, requires proof beyond a reasonable doubt that Wallace inflicted gratuitous violence in murdering Anna or Gabriel.
3
Wallace argues that the State failed to prove that aggravating factor beyond a reasonable doubt. “The term ‘heinous or depraved,’ ” as used in § 13-751(F)(6), describes “the defendant’s state of mind.”
State v. Murdaugh,
¶ 10 In
State v. Bocharski,
this Court clarified the standard for gratuitous violence, recognizing that our “prior eases ha[d] not been entirely consistent in describing the showing needed to establish” that factor.
*159
¶ 11 In
Bocharski,
this Court found on independent review that the State failed to prove gratuitous violence beyond a reasonable doubt even though the defendant had stabbed thе victim twenty-four times in the head, including eight wounds that penetrated deep into the victim’s face and head.
¶ 12 Even before
Bocharski,
this Court had made clear that multiple, rapid attacks on a victim, although reprehensible, do not necessarily establish gratuitous violence when the attacks were madе in attempting to kill the victim. In
State v. Canez,
for example, the defendant “attempted to strangle [the victim], stabbed him six times, and delivered 21 blunt force injuries, ten of them to the head.”
¶ 13 Similarly, in
State v. Anderson,
even though it was a “closet ] question,” we could not find gratuitous violence.
[Two victims] were subjected to prolonged and varied attacks before they succumbed. [One] had his throat slashed, a knife pounded into his ear, and his head beaten with a rock. [The other] was shot through the jaw, hit over the head with a rifle butt and a lantern, and then killed by blows to the head from a cinder block. While these multiple attacks were reprehensible, they do not meet the (F)(6) test of gratuitous violence. Each attack came in an attempt — albeit clumsy — to kill the victim, not engage in violence beyond that necessary to kill.
Id.
III.
¶ 14 Although this Court has previously considered whether Wallace inflicted gratuitous violence on his victims, the law, most notably in
Bocharski,
has evolved in this area. In
Wallace III,
we disavowed the reasoning used in
Wallace I
and
Wallace II
and held that the trial court erred in instructing the jury to consider “whether the defendant had available less violent alternatives to cause death” in evaluating gratuitous violence.
¶ 15 This Court also concluded in
Wallace III
that the issue of gratuitous violence should not have been submitted to the jury with respect to Susan’s murder.
Id.
at 7 ¶ 36,
¶ 16 This Court in
Wallace III
found sufficient evidence to submit the issue of gratuitous violence to the jury on remand with respect to the murders of Anna and Gabriel.
Id.
at 7 ¶¶ 32-35,
IV.
¶ 17 In the aggravation phasе of the 2009 trial, the medical examiner, Dr. Parks, testified about Anna and Gabriel’s injuries. Crime scene and autopsy photos depicting their wounds were admitted into evidence. Transcripts of the recorded statements Wallace made to police the day after the murders were also introduced. In our independent review, we must determine whether the State proved beyond a reasonable doubt that Wallace inflicted gratuitous violence on the children, analyzing the evidence separately as to each of those victims.
A. Anna’s murder
1. More injury than necessary to kill
¶ 18 Dr. Parks testified that Anna suffered at least ten blows to the head, causing two skull fractures. But he was not able to determine the order of the blows, nor could he determine which blow caused her death. Describing the neck wound, Dr. Parks stated that the bat went through the skin of Anna’s lower neck, into her left chest cavity, breaking a rib in her lower chest cavity, and pushed through the body to her back, leaving “a bulge in her back where the end of the bat came to rest.”
¶ 19 Dr. Parks testified that the late Dr. Jones, who had conducted the autopsy of Anna, listed cerebral injuries as a cause of death, indicating that Dr. Jones did not consider the wound through the neck to be a cause of death. Dr. Parks stated that when the bat entered Anna’s chest and neck area, it did not hit any major arteries or other blood vessels; thus, the neck wound alone would not have been fatal. But Dr. Parks could not determine whether Anna was alive when Wallace inserted the bat into her neck. When asked whether he thought the bat wound to Anna “finished the act of killing her,” he stated “I don’t exactly know.” When asked whether it “hastened the act of killing her,” he stated “it’s possible it could have contributed.”
¶20 Dr. Parks acknowledged that at the 2005 trial, he had testified that he could not conclude with certainty whether Anna sustained more injuries than were necessary to have caused her death. Based on the small amount of blood found in Anna’s chest cavity, however, Dr. Parks opined, “[i]f [Anna] was alive when the bat was placed [in her neck], she didn’t live much longer after that or she was in the process of dying when the bat was inserted.” He explained “[s]he would not have been able to live too long and have such a small amount of blood accumulate.”
¶ 21 Whether the evidence establishes that more injury than necessary to kill was inflicted on Anna is a close question. Dr. Parks never clearly expressed an opinion to that effect. But this Court can infеr that Wallace did not have to stab Anna through the neck with the bat in order to kill her after already inflicting ten blows to her head. Although there is uncertainty about whether Anna was still alive when the neck wound was inflicted, the inquiry is not whether the victim was dead before further injury was inflicted, but rather whether more injury was inflicted than necessary to kill.
See Bocharski,
*161 2. Knew or should have known requirement
¶ 22 The more difficult question is whether the State proved beyond a reasonable doubt that Wallace continued to inflict injury after he knew or should have known that he had inflicted a fatal wound. Wallace stated that he hit Anna on the head because “I thought she would die with one blow, that’d be it, like in the movies, it ain’t that way, she looked me in the eye, she knew who was killing her.” After Anna fell to the ground, Wallace said, she continued to moan and breathe. He stated, “she wouldn’t die. I broke a f * * ring bat on her head and she was still moaning. I don’t know what people are like when they are dead. I wanted to put her out of her misery man, and she wouldn’t f * * ring die.”
¶ 23 Wallace also said that even after he jammed the bat piece through Anna’s throat, “she still wouldn’t die.” Before Gabriel’s arrival, Wallace went to the shed to get a piece of steel to kill Gabriel because, he said, “I didn’t knоw how hard it was to kill a human being, I didn’t want Gabe to go through what I put Anna through, I wanted her to die quick and she didn’t.”
¶ 24 The State argues that Wallace’s “self-serving” statements about Anna’s moaning and breathing and his difficulty killing her should be given little weight. But Wallace made the statements the day after the murders when he turned himself in to the police and freely admitted his crimes, providing many incriminating details without attempting to escape blame or minimize his actions. Indeed, Wallace’s statements were the only direct evidеnce about how the murders occurred.
¶ 25 Wallace’s observations that Anna was “moaning” before he stabbed her through the neck were supported by Dr. Parks’s testimony. Dr. Parks was not able to determine whether Anna was alive when Wallace drove the bat through her neck. In addition, Dr. Parks agreed that Anna might have still been conscious during the striking of the blows to her head, and that she might have still been moving such that “the person inflicting the blows would not realize that the person was, in fact, fatally injured.” Rеferring to Wallace’s next-day statement that Anna was breathing, moaning, making eye contact, and “just wouldn’t die,” the defense asked, “[i]s that medically logical and consistent with the injuries that you observed through your photos and [the autopsy] report?” Dr. Parks responded “[y]es.”
¶ 26 On this record, we cannot find beyond a reasonable doubt that Bocharski’s actual or constructive knowledge requirement was met. Viewed as a whole, the evidence easts reasonable doubt on whether Wаllace knew or should have known a fatal wound had been inflicted when he stabbed Anna in the neck.
¶ 27 Anna’s murder is more akin to the clumsy and escalating attacks in
Canez
and
Anderson
than to murders in recent eases in which the Court has found gratuitous violence.
See State v. Bearup,
*162 ¶ 28 In sum, the evidence does not establish beyond a reasonable doubt that Wallace knew or should have known that he already had inflicted fatal wounds upon Anna before committing his final assault. We therefore cannot find heinousness or depravity, the sole aggravating factor in this case.
B. Gabriel’s murder
1. More injury than necessary to kill
¶ 29 Dr. Parks testified that there were a total of eleven lacerations on Gabriel’s head, and that no more than eleven blows would have caused those lacerations. Dr. Pai’ks was not able to determine the order of the blows or which particular one caused Gabriel’s death, but opined that two separate wounds to Gabriel’s head would alone “most likely [have been] fatal.” One of those blows to the forehead exposed Gabriel’s brain and caused a portion of brain tissue to separate from thе rest of his brain and exit Gabriel’s skull. Another fatal skull fracture near Gabriel’s right ear protruded inward, causing a deep depression in Gabriel’s head.
¶ 30 On cross examination, Dr. Parks acknowledged that he “could not say that the injuries [Gabriel] sustained were more ... than were necessary to have caused his death.” But later, when asked whether he thought either the “gaping hole” to Gabriel’s forehead or the “caved in portion” of his head could by itself have caused Gabriel’s death, Dr. Parks rеsponded affirmatively. We therefore conclude that the State proved beyond a reasonable doubt that Wallace inflicted more injury than necessary to kill Gabriel.
2. Knew or should have known requirement
¶31 When asked by police whether he knew Gabriel was dead during the attack, Wallace said, “I just knew I had to kill him, I couldn’t stand there and watch him go.” When asked whether Gabriel was moving, Wallace said, “He might, he, body reflexes, he probably flinched or something, I smashed his skull in.” As noted earlier, he also stated, “I never killed аnybody be-fore____ I tried to kill his sister and she wouldn’t die. I broke a f * * *ing bat on her head and she was still moaning. I don’t know what people are like when they’re dead.”
¶ 32 Dr. Parks testified that, if the two most severe blows to Gabriel’s head were delivered in rapid succession, there would be “no time for the person to register the effect of Blow A versus Blow B.” He further acknowledged that the potentially fatal blows could have been the final two impacts to Gabriel’s skull. Dr. Parks agreed that Gabriel might have still bеen conscious as his head was struck and might have exhibited some bodily movement “to make one think the person was still alive.” In that regard, Dr. Parks acknowledged that Wallace’s statement that Gabriel might have been “flinching” during the blows was medically consistent with his observations. When asked about the blood found in Gabriel’s lungs, Dr. Parks stated that this indicated Gabriel’s “breathing following at least some of the injuries.”
¶ 33 Whether Bocharski’s knowledge requirement has been established with respect to Gabriel’s murder is difficult tо determine. In contrast to his recollection of Anna’s murder, Wallace was less certain about whether Gabriel was flinching during the attacks, which suggests that he was not motivated by Gabriel’s movements to continue attacking him. Given the heavy tool and force used to pummel Gabriel’s head, the number of blows inflicted, and the nature and severity of the injuries Gabriel suffered, it is certainly arguable that Wallace should have known that striking the head of a 102-pound twelve-year-old with an 18-inch pipe wrench nine or fewer times, rather than ten or eleven times, would have been sufficient to kill.
See Wallace III,
¶ 34 But Wallace stated that he used the pipe wrench on Gabriel because he had such difficulty killing Anna and wanted Gabriel to die more quickly than her. As in Bocharski the injuries occurred in quick succession, and all the blows were delivered with the means *163 used to inflict death, facts that tend to cut against a finding of gratuitous violence. In addition, as Dr. Parks acknowledged, the most obviously fatal and gruesome wound that caused Gabriel’s skull to split open could have been the final blow. Creating further doubt, Dr. Parks also acknowledged that in 2005 he could not say for certain whether more injury than necessary to kill was inflicted on Gabriel.
¶ 35 Although the issue is very close, on our independent review of this record, we cannot find beyond a reаsonable doubt that Wallace “continued to inflict violence [on Gabriel]
after he knew or should have known that a fatal action had occurred.” Bocharski,
V.
¶ 36 Even among capital eases, this ease is atrocious. Wallace’s premeditated, brutal murders of Anna and Gabriel clearly were senseless, and the unsuspecting, defenseless victims were helpless. Under Arizona’s current statutes, Wallace most certainly would be eligible for the death sentence. See supra n. 3. But under the applicable law when Wallace murdered the victims, his eligibility for capital punishment requires a finding of gratuitous violence to establish heinousness or depravity under § 13 — 751(F)(6).
¶ 37 The United States Supreme Court determined that A’izona’s (F)(6) aggravating circumstance is facially vague but “can be curеd by a state appellate court applying a narrowed construction of the aggravator and determining
de novo
whether the evidence supported the finding of the aggravator.”
Anderson,
¶ 38 In common parlance, Wallace’s crimes undoubtedly would be characterized as heinous or depraved. But under the Supreme Court’s jurisprudence, we must apply narrowing constructions of those words, not common understandings, to avoid “serious constitutional problems.”
State v. Carlson,
¶ 39 Under
Bocharski
and our other (F)(6) narrowing jurisprudence, we conclude on independent review that the evidence does not show beyond a reasonable doubt that Wallace actually or constructively knew that he had delivered one or more fatal blows to Anna or Gabriеl before he stopped striking them. We therefore vacate the death sentences imposed on the two convictions relating to Anna and Gabriel’s murders and impose life sentences for each of those convictions.
7
See State v. Snelling,
Notes
. We refer to the current version of statutes that have not substantively changed since Wallace's crimes were committed.
. After the United States Supreme Court decided
Ring v. Arizona,
. Gratuitous violence was the State’s only theory for the (F)(6) aggravating circumstance of heinousness or depravity. If the crimes were committed today, the multiple homicides aggravator could also be alleged for each murder.
See
A.R.S. § 13-751(F)(8). And the murder of Gabriel could be aggravated because he was twelve years old when killed.
See
A.R.S. § 13-751(F)(9). But because the legislature enacted those provisions after Wallace committed the murders, 1985 Ariz. Sess. Laws, ch. 364, § 8 (1st Reg. Sess.); 1984 Ariz. Sess. Laws, ch. 66, § 1 (2nd Reg. Sess.), they cannot serve to make Wallace death-eligible,
State v. Correll,
. Five factors support a finding of heinousness or depravity: (1) relishing; (2) infliction of gratuitous violence; (3) needless mutilation of the victim; (4) senselessness of the crime; and (5) helplessness of the victim.
State v. Gretzler,
. We reject Wallace’s suggestion that the law requires a distinct еlement of "actual knowledge and intent’’ in addition to Bocharski's second requirement of actual or constructive knowledge.
See Bocharski,
. Pre-Bocharski cases in which this Court found that the defendant inflicted violence beyond that necessary to cause death are generally unhelpful. not having engaged in the two-step analysis that Bocharski now requires.
. In view of this disposition, we do not address Wallace's mitigation evidence, his various other issues raised on appeal, or the sixteen additional issues he presented to avoid preclusion.
See Bocharski,
