OPINION
¶ 1 Aрpellant Darrel Peter Pandeli was convicted of first degree murder in 1997 and sentenced to death in 1998 for the murder of Holly Iler. On appeal, we affirmed both his conviction and his death sentence.
State v. Pandeli (Pandeli I),
I. FACTS AND PROCEDURAL BACKGROUND
¶ 2 Holly Iler’s nude body was found in a central Phoenix alley on the morning of September 24, 1993. She had been beaten, her throat had been slashed, and her nipples had been excised after her death. During the course of the police investigation, Pandeli confessed to murdering Iler. A more detailed description of the Iler murder may be found in
Pandeli I,
¶ 3 After confessing to the Iler murder, Pandeli admitted that he had previously killed another woman. Teresa Humphreys’ body was found on a sidewalk in central Phoenix in January 1992. She had been stabbed several times in the chest and back, her throat had been slashed, and she suffered extensive defensive wounds to her hands. In 1996, Pandeli was convicted of second degree murder for killing Humphreys and was sentenced to twenty years in prison.
¶ 4 Pandeli’s resentencing for the Iler murder commenced in February 2006. The State sought to prove two aggravating circumstances: that Pandeli had been “previously convicted of a serious offense,” see A.R.S. § 13-703(F)(2) (Supp.1993), and that he committed the murder in an “especially heinous ... or depraved manner,” see id. § 13-703(F)(6). In support of the (F)(2) aggravating factor, the State produced evidence of the Humphreys murder conviction. To prove the (F)(6) aggravating factor, the State introduced evidence that Pandeli mutilated Iler’s body and kept souvenirs of the murder. *521 The jury found both aggravating circumstances and rendered a verdict of death.
II. DISCUSSION
¶ 5 Pandeli raises eight issues on appeal and lists seven additional issues to avoid preclusion. We address only those issues argued to this Court and append a list of preserved claims to this opinion.
A. Ability to Conduct Voir Dire
¶ 6 Pandeli claims that the trial court’s failure to rule before trial on the scope of the State’s penalty phase rebuttal hindered his ability to conduct voir dire because he did not know whether to question jurors about their feelings regarding serial killers. Before trial, the State asked to introduce the facts of Teresa Humphreys’ murder in rebuttal to Pandeli’s proffered mitigation evidence to demonstrate that Pandeli should not be shown leniency. The trial court deferred ruling on the motion until after the defense presented its mitigation evidence to allow the court to assess whether the Humphreys murder evidence would be relevant.
¶ 7 At the oral argument on the motion, Pandeli did not argue that thе court’s failure to rule would hinder his ability to conduct voir dire; he first made that argument in his motion for a new trial, filed after he had been sentenced to death. Because Pandeli did not object on these grounds at trial, we review for fundamental error.
State v. Henderson,
¶ 8 We conclude that the judge’s delay in ruling did not deprive Pandeli of the ability to conduct voir dire. There was no error, much less fundamental error. Despite the trial court’s decision not to rule immediately on the State’s motion, the defense had the opportunity to question the prospective jurors about their feelings toward serial killers. The prospective jurors were informed that Pandeli had previously been convicted of another murder and were asked in the Jury Selection Questionnaire whether they thought the death penalty was apprоpriate for serial murderers. Defense counsel then had the opportunity to follow up on this issue. Several prospective jurors were questioned about their beliefs regarding serial killers.
¶ 9 Moreover, Pandeli has not identified any questions he wanted to ask but was denied permission to ask. And, generally, any overly specific questions would not have been allowed. A defendant does not have the right to “commit [prospective jurors] to certain positions prior to receiving the evidence.”
State v. Melendez,
¶ 10 Finally, to the extent that Pandeli complains about the voir dire of prospective jurors 29, 42, and 77, those individuals were dismissed and did not sit on the jury; therefore, Pandeli cannot show any prejudice stemming from his inability to question these jurors.
See State v. Glassel,
B. Aggravation Phase Issues
1. (F)(2) aggravating circumstance
¶ 11 Pandeli next claims three separate errors with regard to the (F)(2) “serious offense” aggravating factor: (1) The trial court improperly allowed the State to introduce the underlying facts of the Humphreys murder to prove the (F)(2) aggravating factor; (2) the trial court should not have allowed the State to present any evidence of the (F)(2) aggravating factor to the jury and instead should have told the jury that the aggravating circumstance was established; and (3) use of the Humphreys murder convic
*522
tion to support the (F)(2) aggravating circumstance violated the Double Jeopardy Clause because it allowed additional punishment to stem from a prior conviction. We review evidentiary rulings of the trial court for abuse of discretion,
State v. McGill,
a. Evidence of prior conviction
¶ 12 “The proper procedure to establish [a] prior conviction is for the state to offer in evidence a certified copy of the conviction ... and establish the defendant as the person to whom the document refers.”
State v. Lee,
b. Submission of (F)(2) aggravating factor to jury
¶ 13 Pandeli argues that submitting the (F)(2) aggravating factor to the jury violated his Sixth Amendment right. We disagree.
¶ 14 After receiving a new sentencing hearing to cure the error caused by allowing the judge to find the aggravating circumstances, Pandeli now claims that the jury should not have been allowed to find the (F)(2) aggravating factor because the Sixth Amendment to the United States Constitution does not require a jury to determine the existence of a prior conviction.
See State v. Ring (Ring III),
¶ 15 Pandeli also argues that it was unnecessary for the jury to find the existence of his prior conviction because a trial judge’s finding in an earlier sentencing proceeding that a prior conviction exists may not be disturbed at resentencing. In support of this proposition, he cites
State v. Montaño,
c. Double jeopardy violation
¶ 16 Finally, Pandeli argues that the use of the Humphreys murder conviction to establish the (F)(2) aggravating factor violated double jeopardy by allowing additional punishment for a prior crime. We have previously held that using a prior conviction under a recidivist statute to enhance a sentence on a new and separate charge does not violate double jeopardy.
State v. Mauro,
2. Constitutionality of (F)(6) aggravating circumstance
¶ 17 Pandeli asserts that the (F)(6) “especially heinous, cruel or depraved” aggravating circumstance is unconstitutionally vague and overbroad. He makes three separate arguments in support of his assertion: (1) This Court has faded to sufficiently define the factor through specific and consistent guidelines; (2)
Walton v. Arizona,
a. Failure to sufficiently define the (F)(6) factor
¶ 18 In
Walton v. Arizona,
the Supreme Court of the United States held that Arizona’s (F)(6) statutory aggravating circumstance is facially vague.
b. Jury sentencing renders instruction vague as applied
¶ 19 Pandeli argues that
Walton
does not save the (F)(6) factor from unconstitutional vagueness because juries, rather than trial judges, now find the existence of aggravating circumstances. We have rejected this argument several times.
State v. Cromwell,
c. Sufficiency of the jury instructions
¶20 Pandeli argues that the jury instructions given at his sentencing did not sufficiently define “heinous” and “depraved” because those words were defined by equally vague terms. We disagree. The terms heinous and depraved were properly defined using terms that were themselves clearly defined. The instructions stated, in relevant part:
The terms “heinous” or “depraved” focus upon a defendant’s state of mind at the time of the offense, as reflected by his words and actions at or near the time of the offense. A murder is especially heinous if it is hatefully or shockingly evil: grossly bad. A murder is especially depraved if it is marked by debasement, corruption, perversion or deterioration. To determine whether Defendant’s actions were especially heinous or depraved, you should consider whether Defendant’s behavior evidenced any of the following:
1. Relishing the murder; or
2. Inflicting gratuitous violence on the victim bеyond that necessary to kill; or
3. Mutilating the victim’s body.
In this context, “relishing” refers to Defendant’s words or actions that demonstrate debasement or perversion. In order to support a finding of relishing, Defendant must say or do something, other than *524 committing the murder itself, to show that he savored or reveled in the killing.
In this context, “gratuitous violence” refers to violence committed upon the victim beyond that necessary to kill. Gratuitous violence also may be found if you determine that the circumstances evidence that the murder could have been accomplished by less violent manners.
In this context, “needless mutilation” means that Defendant, in any act separate and distinct from the killing itself, committed other acts with the intent to mutilate the victim’s corpse, such as the purposeful severing of body parts.
¶ 21 We conclude that the terms “heinous” and “depraved” were defined using easily understood terms or terms that were themselves defined. Moreover, the instructions are virtually identical to the ones wе approved in
Anderson II,
3. Photographs admitted to prove (F)(6) aggravating circumstance
¶ 22 Pandeli next contends that the trial court erred when it admitted photographs of Holly Iler’s body, photographs of a Confederate flag found in Pandeli’s van, and a photograph of his body that showed his tattoos. We review a trial court’s rulings on the admissibility of photographic evidence for abuse of discretion.
McGill,
¶ 23 Relevant evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice. Ariz. R. Evid. 403. When assessing the admissibility of photographs, we “consider the photographs’ relevance, the likelihood that the photographs will incite the jurors’ passions, and the photographs’ probative value compared to their prejudicial impact.”
McGill,
a. Photographs of Iler’s body
¶ 24 Pandeli specifically objects to the admission of exhibits 40, 44,100,102, 103, and 105 because they were “gruesome and inflammatory.” The State introduced the photographs to support testimony establishing the “heinous” and “depraved” prongs of the (F)(6) aggravating factor. The six contested photographs depict the victim’s body at the scene of the crime as well as during the autopsy. They illustrate all of her wounds including the bruising to her face, her nipple excision wounds, and her slashed throat. All of the contested photographs are relevant.
See Hampton,
¶25 Pandeli argues, however, that the photographs were irrelevant and introduced to inflame the passions of the jury because the defense did not contest, and indeed had offered to stipulate to, the facts of the murder. On this issue, we have stated that “[e]ven if a defendant does not contest certain issues, photographs are still admissible if relevant because the burden to prove every element of the crime is not relieved by a defendant’s tactical decision not to contest an essential element of the offense.”
State v. Dickens,
b. Photographs of tattoos and Confederate flag
¶27 Pandeli asserts that exhibits 59, 64, and 65 were irrelevant and prejudicial, and therefore were improperly admitted. These photographs, like the photographs of Iler’s body, were admitted to prove the (F)(6) aggravating circumstance. Exhibit 65 depicts the side of Pandeli’s van and shows that he used a Confederate flag as a window covering. Exhibit 59 is a close-up photograph of the Confederate flag that shows some blood spatter. Exhibit 64 shows Pandeli standing shirtless, shortly after his arrest. It reveals tattoos on his upper arms and the upрerleft side of his chest. The photograph was taken from a distance so the viewer cannot discern what the tattoos depict.
¶ 28 The photographs of the Confederate flag are relevant. Exhibit 59 shows the victim’s blood on the flag, and exhibit 65 shows the van in which the murder took place. The photograph of Pandeli is also relevant because it depicts Pandeli’s physical condition at the time of the murder and shows no visible injuries or defensive wounds resulting from the crime. Although relevant, the photographs had minimal probative value. Pandeli had already stipulated to the existence of blood on the flag, and the facts that the murder took place in the van and the absence of injuries to Pandeli were not contested.
¶29 The photographs, however, are also minimally prejudicial. The Confederate flag photographs had little prejudicial impact because the defense stipulated to the existence of blood on the “Confederate flag taken from the rear side window” of Pandeli’s van. We find it unlikely that the photographs of the flag prejudiced the jury any more than the stipulation.
Cf. McGill,
C. Penalty Phase Issues
1. State prevented jury from, considering mitigation evidence
¶ 30 Pandeli claims that the State improperly limited the type of mitigation the jury could consider by arguing in closing that (1) there was no causal nexus between the mitigating evidence and the crime, and (2) Pandeli knew right from wrong. When an objection was made, we review a trial court’s ruling on the scope of closing argument for abuse of discretion.
See State v. Roque,
a. Mitigating evidence has no causal nexus to crime
¶31 Pandeli claims that the State improperly suggested in closing argument that the jurors could not find mitigation in the absence of a causal nexus between the mitigating evidence and the crime, in violation of
Tennard v. Dretke,
¶ 32 We addressed, and rejected, this precise claim in Anderson II, stating:
Once the jury has heard all of the defendant’s mitigation evidence, there is no constitutional prohibition against the State arguing that the evidence is not particularly relevant or that it is entitled to little weight. The prosecutor’s various comments and questions here simply went to the weight of Anderson’s mitigatiоn evidence and were not improper.
¶ 33 Furthermore, any potential error was cured by the jury instructions, which informed the jurors that they should consider and give effect to all of Pandeli’s mitigation evidence. The court specifically instructed the jurors that “[t]he defendant need not prove that the mitigating circumstances were the direct cause of the offense.” The court also told the jurors to “consider and give effect to all mitigating circumstances that have been raised by any aspect of the evidence.” These instructions remedied any potential error.
See Roque,
b. Pandeli knew right from wrong
¶ 34 In
Eddings v. Oklahoma,
the Supreme Court of the United States held that “[j]ust as the State may not by statute preclude the sentencer from considering any mitigating factor, neither may the sentencer refuse to consider, as
a matter of law,
any relevant mitigating evidence.”
¶ 35 Pandeli asserts that the State did just that when it argued in its closing that Pandeli knew the difference between right and wrong and that the jurors should put Pandeli’s background and actions “in perspective.” The State, however, did not direct the jurors to disregard the mitigation evidence; it simply suggested that jurors should assign less weight to the mental health mitigation presented by Pandeli’s expert witnesses. Such argument is proper.
See Anderson II,
¶36 Moreover, any potential error was remedied by the jury instructions.
See Roque,
¶ 37 Pandeli also claims that the State’s argument that Pandeli knew right from wrong was irrelevant. We have previously held, however, that a defendant’s knowledge of right and wrong decreases the weight given to mental health mitigation.
Johnson,
2. Presumption of death in jury instructions
¶38 Pandeli next asserts that the penalty phase jury instructions were improper because they placed on him the burden of
*527
proving that the mitigation was sufficiently substantial to call for leniency. We review de novo whether jury instructions given by the trial court correctly state the law and are cоnstitutional.
State ex rel. Thomas v. Granville (Baldwin),
¶39 The trial court issued the following instructions regarding the consideration of mitigating circumstances:
The Defendant bears the burden of proving the existence of any mitigating circumstance by a preponderance of the evidence. That is, although the Defendant need not prove its existence beyond a reasonable doubt, the Defendant must convince you by the evidence presented that it is more probably true than not true that such a mitigating circumstance exists. Proof by a preponderance of the evidence is a lower burden than proof beyond a reasonable doubt.
You individually determine whether mitigation exists. Considering the aggravating circumstances you have found, you must then individually determine if the total of the mitigation is sufficiently substantial to call for leniency. “Sufficiently substantial to call for leniency” means that mitigation must be of such quality or value that it is adequate, in the opinion of an individual juror, to persuade that juror to vote for a sеntence of life in prison.
Even if a juror believes that the aggravating and mitigating circumstances are of the same quality or value, that juror is not required to vote for a sentence of death and may instead vote for a sentence of life in prison. A juror may find mitigation and impose a life sentence even if the Defendant does not present any mitigation evidence.
¶40 Nothing in the instructions suggests that the Defendant bears the burden of proving that the mitigation is sufficiently substantial to call for leniency; to the contrary, the instructions state that a juror in equipoise regarding mitigating and aggravating cir-cumstanees is not required to vote for death. The instructions make it clear that the sentencing decision is not a “fact question” and that it must be “based upon the juror’s assessment of the quality and significance of the mitigating evidence that the juror has found to exist.”
Id.
at 473, ¶ 21,
3. Scope of rebuttal
¶41 Pandeli argues that the trial court erred by allowing the State to introduce irrelevant and prejudicial “dump-truck aggravation” in rebuttal to the defense mitigation case.
3
We review for abuse of discretion evidentiary rulings to which an objection was made.
McGill,
¶ 42 The penalty phase relevance analysis differs from a normal relevance analysis because the Rules of Evidence do not apply in the penalty phase of a capital case. A.R.S. § 13-703(0) (Supp.2006). Instead, A.R.S. § 13-703.01(0 sets forth the scope of rebuttal evidence: “[T]he state may present any evidence that demonstrates that the defendant should not be shown leniency.”
¶43 The Due Process Clause of the Fourteenth Amendment, however, places limitations on rebuttal evidence.
Hampton,
Trial courts can and should exclude evidence that is either irrelevant to the thrust of the defendant’s mitigation or otherwise unfairly prejudicial. Nothing in our death penalty statutes strips courts of their au *528 thority to exclude evidence in the penalty phase if any probative value is substantially outweighed by the prejudicial nature of the evidence. Trial courts should not allow the penalty phase to devolve into a limitless and standardless assault on the defendant’s character and history. Rather, trial judges should exercise their broad discretion in evaluating the relevance of such bad acts evidence to any mitigation evidence offered.
Id.
at 180, ¶51,
a. Violent sex and fantasies
¶ 44 Pandeli argues that the trial court abused its discretion by admitting the testimony of two of his former girlfriends. Because he did not object below, we review for fundamental error.
Henderson,
¶ 45 Both women testified about Pandeli’s aggressive sexual behavior and violent fantasies. The State offered the evidence to rebut testimony by Pandeli’s mental health experts that he was impulsive as a result of mental impairment. Pandeli’s former girlfriends’ testimony rebutted his mental health mitigation because it tended to show that the murders were not committed impulsively, but were instead part of a pattern of escalating sexual violence.
¶ 46 Pandeli also introduced extensive testimony of his good behavior in prison and his lack of future dangerousness. The testimony of the girlfriends rebutted Pandeli’s future dangerousness mitigation and tended to show that he should not be shown leniency.
¶47 We conclude that the evidence was relevant and that the prejudicial impact of the description of Pandeli’s sexual behavior and violent fantasies did not outweigh the probative value of the evidence. There was no fundamental error.
b. Child molestation
¶ 48 Pandeli also claims that the trial court improperly allowed one former girlfriend to testify that Pandeli molested her daughter. Pandeli’s counsel argued that this evidence was admissible; therefore, we must review for fundamental error.
Id.
at ¶ 19,
¶49 The witness testified that one night, when Pandeli was drunk, he crawled into her four-year-old daughter’s bed and molested her. She also testified about the impact of that abuse on her daughter’s life. This testimony was damaging.
¶ 50 We conclude that there was no reversible error, however, because Pandeli invited the error. At trial, the court asked whether Pandeli’s counsel objected to the child molestation testimony and he explicitly stated that he did not. He agreed that the testimony was admissible “other act” evidence. “This court has long held that ‘a defendant who invited error at trial may not then assign thе same as error on appeal.’”
Moody,
c. Humphreys murder testimony
¶ 51 Pandeli next argues that the trial court abused its discretion when it allowed the State to introduce the underlying facts of the Humphreys murder, because such evidence was irrelevant, prejudicial, and cumulative. Evidence regarding the Humphreys murder was presented through the testimony of Dr. Keen, the county medical examiner, and Detectives Gregory and Rea, to demonstrate that Pandeli did not deserve to be shown leniency.
¶ 52 All of the testimony presented by the State was relevant. The facts of Hum-phreys’ brutal murder demonstrated that Pandeli was not entitled to leniency.
See
A.R.S. § 13-703.01(G). Furthermore, the
*529
fact that Pandeli murdered two women in a similar, savage fashion rebutted his mental health mitigation by tending to show that he did not act impulsively. Moreover, one of Pandeli’s experts, Dr. Cunningham, relied on the facts of the Humphreys murder to support his opinion of Pandeli’s mental health.
Cf. Johnson,
1153 The fact that the evidence was relevant does not end our analysis; we must also determine whether the evidence was unfairly prejudicial.
Smith,
d. Humphreys murder photographs
¶ 54 Pandeli argues that photographs relating to the Humphreys murder were improperly admitted because he did not contest any of the facts of the murder, and thus the photographs were irrelevant and unduly prejudicial. 4 Pandeli objects to exhibits 218-246, 248-250, and several photographs that were never admitted into evidence. We do not address the photographs that were not admitted. The photographs that were admitted into evidence show where Humphreys’ body was found, her body at the crime scene, the severe defensive wounds to her hands, her slit throat, a moon-shaped knife wound on her chest, a different wound on her chest, wounds on her back, and a photograph of the folder in which the photographs were kept by the police.
1155 The photographs shown to the jury were relevant to corroborate the testimony of the detectives and the medical examiner concerning the Humphreys murder.
See Hampton,
¶ 56 The photographs were not so prejudicial as to render Pandeli’s trial fundamentally unfair. Exhibits 218-219, 232-234, and 246 do not show Humphreys’ body. And although the photos of Humphreys’ body are somewhat gruesome, the jurors likely were not unduly shocked in light of the detectives’ and medical examiner’s testimony regarding Humphreys’ injuries and the fact that the jurors had seen the photographs of Holly Iler’s body during the aggravation phase.
See McGill,
e. Lavora Humphreys’ testimony
¶ 57 Pandeli also claims that the trial court abused its discretion when it allowed Lavora Humphreys, Teresa Humphreys’ sister, to testify because her testimony was cumulative, irrelevant, and imрroper “victim impact” testimony. Lavora Humphreys testified about the clothing Teresa was wearing the last time Lavora saw her, that Teresa never carried a knife, that she did not know how to drive, and that she had no major injuries before she was killed. Lavora also described the position of Teresa’s body at the crime scene and stated that “we didn’t want Teresa to leave and she left, and a couple *530 occurrences happened before she was walking out the door.”
¶58 With the exception of the statement that she “didn’t want [Teresa] to leave,” none of Lavora’s testimony was “victim impact” testimony. The single improper statement was interrupted by defense counsel’s objection, and Lavora was not allowed to describe the “occurrences” that she mentioned. La-vora’s testimony was also not cumulative because the information she provided was not previously given by Detectives Gregory or Rea or by Dr. Keen. Her testimony was, however, mostly irrelevant and did not provide any important facts of the crime.
¶ 59 Although minimally probative, the trial court did not abuse its discretion in admitting Lavora’s testimony because it was also minimally prejudicial.
See Cañez,
f “Battered Relationships ” pamphlet
¶ 60 Pandeli also argues that the trial court abused its discretion by allowing the State to admit a pamphlet entitled “Battered Relationships.” This document, however, was neither admitted into evidence nor discussed in front of the jury. Consequently, no error occurred.
D. Severability of Death Penalty Statute
¶ 61 Pandeli asserts that the portion of the death penalty statute struck down in Ring II is not severable from the rest of the statute, rendering the whole statute unconstitutional. Therefore, he argues, he should be sentenced to life in prison in accordance with a provision of Arizona law that provides as follows:
In the event the death penalty is held to be unconstitutional on final appeal, a person convicted of first degree murder or another offense punishable by death who has been sentenced to die shall be resentenced by the sentencing court to life imprisonment without possibility of parole until the person has served a minimum of twenty-five calendar years.
1973 Ariz. Sess. Laws, ch. 138, § 10. We review constitutional questions and questions of statutory interpretation de novo.
Roque,
¶ 62 In
State v. Watson,
this Court explained that “[s]everability is a question of legislative intent.”
the legislature would have enacted [the statute without the unconstitutional portion], if it had known of the invalidity, or, as otherwise stated, if the valid or invalid parts are not so intimately connected as to raise the presumption that the legislature would not have enacted the one without the other.
Id.
(quoting
Millett v. Frohmiller,
¶ 63 Applying these tеsts to the death penalty statute, we conclude that the portion of the statute struck down in Ring II, which allowed a judge to find aggravating circumstances, is not so intimately connected to the rest of the statute as to raise the presumption that the legislature would not have enacted the statute without it. We doubt that the legislature enacted the death penalty statute contingent upon judges serving as the fact-finders for aggravating circumstances. Furthermore, the statute, shorn of the unconstitutional provision, is still workable.
¶ 64 We came to a similar conclusion in
Watson.
In that case, the issue before the Court was whether the portion of the death penalty statute limiting the type of mitigation evidence a defendant could present was sev-erable from the rest of the statute.
Id.
at 445,
¶ 65 The right to trial by jury in criminal cases is enshrined in two provisions of the Arizona Constitution, 5 as well as the Sixth Amendment of the United States Constitution. It is reasonable to presume that had the legislature known that juries, not judges, had to find aggravating factors, it would nonetheless have enacted the statute without the portion struck down in Ring II. Moreover, the legislature’s decision to have the death penalty is not inextricably intertwined with the identity of the fact-finder for aggravating circumstances. Because the portion of the death penalty statute struck down in Ring II was severable, the unoffending portions remained effective, and the provision requiring automatic conversion of a death sentence to a life sentence does not apply. See 1973 Ariz. Sess. Laws, eh. 138, § 10.
¶66 Pandeli urges us to follow
Woldt v. People,
¶ 67 In sum, the provision of Arizona’s former death penalty statute struck down in Ring II was severable from the rest of the statute. Thus, Ring II did not render A.R.S. § 13-703 unconstitutional.
E. Independent Review
¶ 68 Because the Iler murder occurred before August 1, 2002, we must independently review the aggravating and mitigating circumstances and the propriety of the death sentence. A.R.S. § 13~703.04(A) (Supp.2006);
see
2002 Ariz. Sess. Laws, 5th Spec. Sess., eh. 1, § 7. In conducting our analysis, we “consider the quality and the strength, not simply the number, of aggravating and mitigating factors.”
Roque,
1. Aggravating circumstances
¶ 69 We conclude, based on our independent review of the record, that the State proved both aggravating factors found by the jury beyond a reasonable doubt. The State proved the (F)(2) factor by introducing Pandeli’s conviction for the second degree murder of Teresa Humphreys, see A.R.S. § 13-703(H)(2) (Supp.1993) (listing second degrеe murder as a serious offense), and by establishing that he was the person convicted. . The State also proved the (F)(6) aggravating factor by demonstrating that Pandeli mutilated Iler’s body and relished the murder by taking souvenirs.
2. Mitigating circumstances
¶70 Pandeli presented evidence of five general types of mitigation in the penalty phase. He first presented evidence of his difficult childhood and family life, including physical and sexual abuse. Pandeli’s father was physically abusive and left the family when Pandeli was approximately two years old. Following the divorce, Pandeli’s mother provided little stability, structure, or supervision to Pandeli or his siblings.
¶71 In addition to general neglect and minor physical abuse, Pandeli was extensively sexually abused throughout his youth. He was first abused by a family friend when he was approximately five or six years old. He was also repeatedly sexually abused by at least four other men, including his uncle and a convicted child molester. Dr. Cunningham, a defense expert, characterized Pandeli’s sex *532 ual abuse as “extensive [and] pervasive” and “as severe a case as I have ever seen.”
¶72 We find that Pandeli has proven by a preponderance of the evidence that he had a dysfunctional childhood and was emotionally neglected, physically abused, and extensively sexually abused. But “a ‘difficult family background, in and of itself, is not a mitigating circumstance’ sufficient to mandate leniency in every capital case.”
Hampton,
¶ 73 The second type of mitigation Pandeli presented was that he began abusing drugs and alcohol when he was extremely young, in conjunction with his sexual abuse. The substance abuse continued throughout his childhood and into adulthood, when he began using cocaine and acid. Pandeli proved by a preponderance of the evidence that he was a drug and alcohol abuser.
¶ 74 Pandeli attempted to tie his substance abuse to the crime in two ways. First, he attempted to prove that he was intoxicated on the night of the murder. Dr. Cunningham testified that Pandeli told him that when the Iler murder took place, Pandeli was intoxicated as a result of using alcohol and methamphetamine. Pandeli’s friends who were with him on the night of the murder, however, contradicted this assertion. Pande-li failed to demonstrate by a preponderance of the evidence that he was intoxicated on the night of the murder.
¶75 Dr. Cunningham and Dr. Walter, a neuropsychologist, аlso attempted to tie Pandeli’s drug use to the murder by arguing that it changed the way his brain functioned. Pandeli did not, however, “provide[] any specific evidence that his brain [functioning] was actually altered by his past alcohol and drug abuse so as to cause or contribute to his participation in the murder[].”
State v. Ellison,
¶ 76 The third type of mitigating evidence Pandeli presented was of his mental impairment and learning disabilities. Pandeli exhibited symptoms of a severe form of Attention Deficit Hyperactivity Disorder (“ADHD”) when he was young and it was suggested that there was a neurological basis for his impairment. Pandeli participated in special education classes from second grade until he quit school at age sixteen.
¶ 77 In addition to his learning disabilities and neurological impairment, Pandeli also suffered from depression. He first attempted to сommit suicide in the third grade and attempted to commit suicide twice more as an adult. Pandeli also had a family history of learning disabilities and depression.
¶ 78 The experts who testified in the penalty phase all agreed that Pandeli suffered some mental impairment. Dr. Walter diagnosed Pandeli as having “cognitive disorder not otherwise specified” due to impairment in his frontal lobe and temporal lobe, and testified that less than five percent of the population is as impaired as Pandeli. Dr. Cunningham testified that Pandeli’s impairments and experiences affected the choices available to him. Dr. Bayless, the State’s expert, testified that Pandeli suffered from depression and diagnosed him as having depressive disorder not otherwise specified, learning disor *533 der not otherwise specified, and antisocial personality disorder. Pandeli established by a preponderance of the evidence that he suffered from some mental impairment.
¶ 79 Pandeli attempted to tie his mental impairment to the crime. Dr. Walter testified that frontal lobe impairment makes a person act impulsively, can cause violence, and could have led to the murder of Iler. Similarly, Dr. Cunningham testified that the murders of both Humphreys and Iler were disorganized, demonstrating that Pandeli’s impairment may have played a role in them. Dr. Walter, however, conceded that Pandeli was capable of learning from past mistakes, and Dr. Cunningham admitted that Pandeli had the ability to make choices and conform to the law. Dr. Bayless testified that Pandeli knew the difference between right and wrong.
¶ 80 Moreover, the State introduced evidence demonstrating that Pandeli was not significantly hampered by his mental impairment. Pandeli’s videotaped confession shows him responding very carefully to the detectives’ questions and lying to avoid responsibility. Pandeli does not have mental retardation. His IQ of approximately 90 is average to low average and two dеfense witnesses characterized him as “street smart.”
¶81 Pandeli has not established a nexus between his impairment and the crime, nor has he proved that he was impaired to such a degree as to interfere with his ability to know the difference between right and wrong or conform his conduct to the law. We consider mental impairment mitigation in proportion “to a defendant’s ability to conform or appreciate the wrongfulness of his conduct.”
State v. Trostle,
¶82 The fourth type of mitigation Pandeli presented was that he. behaved well in prison. He proved by a preponderance of the evidence that he behaved well in prison and posed little risk of future dangerousness while incarcerated. We give this mitigating circumstance little weight, however, because prisoners are expeсted to behave and adapt to prison life.
State v. Harrod,
¶ 83 Finally, Pandeli presented evidence that he could develop and maintain positive relationships. While he proved this mitigating circumstance by a preponderance of the evidence, this circumstance carries little weight.
E.g., Cañez,
3. Propriety of death sentence
V 84 The mitigation evidence presented by Pandeli is not insubstantial. His history of neglect, sexual abuse, substance abuse, and mental health problems demonstrates that he was an extremely damaged individual. The aggravating circumstances proved by the State, however, are also substantial, especially the fact that Pandeli had previously been convicted of another murder.
Cf. Hampton,
III. CONCLUSION
¶ 85 For the foregoing reasons, we affirm Pandeli’s death sentence.
*534 Appendix
Pandeli raises the following seven challenges to the constitutionality of Arizona’s death penalty scheme to avoid preclusion:
1. The death penalty is per se cruel and unusual punishment. This argument was rejected by the United States Supreme Court in Gregg v. Georgia,428 U.S. 153 , 187,96 S.Ct. 2909 ,49 L.Ed.2d 859 (1976), and by this Court in Harrod,200 Ariz. at 320, ¶ 59 ,26 P.3d at 503 .
2. Execution by lethal injection is cruel and unusual punishment. We rejected this argument in State v. Hinchey,181 Ariz. 307 , 315,890 P.2d 602 , 610 (1995).
3. Arizona’s statutory scheme for considering mitigation evidence is unconstitutional because it limits full consideration of that evidence. We rejected this argument in State v. Mata,125 Ariz. 233 , 241-42,609 P.2d 48 , 56-57 (1980).
4. The State’s discretion to seek the death penalty unconstitutionally lacks standards. We rejected this argument in State v. Sansing,200 Ariz. 347 , 361, ¶ 46,26 P.3d 1118 , 1132 (2001), vacated on other grounds,536 U.S. 954 ,122 S.Ct. 2654 ,153 L.Ed.2d 830 (2002).
5. Arizona’s death penalty provides no meaningful distinction between capital and non-capital cases. We rejected this argument in State v. Salazar,173 Ariz. 399 , 411,844 P.2d 566 , 578 (1992).
6. Arizona’s death penalty statute is unconstitutional because it requires the imposition of death whenever at least one aggravating circumstance and no mitigating circumstances exist. We rejected this argument in State v. Miles,186 Ariz. 10 , 19,918 P.2d 1028 , 1037 (1996).
7. Arizona’s death penalty is unconstitutional because it fails to require the sentencer to consider the cumulative nature of mitigation, nor does it require the sentencer to make specific findings as to each mitigating factor, in violation of the Eighth and Fourteenth Amendments of the United States Constitution. We rejected this argument in State v. Van Adams,194 Ariz. 408 , 423,984 P.2d 16 , 31 (1999).
Notes
. The underlying facts of the Humphreys murder were introduced in the penalty phase to rebut Pandeli’s mitigation evidence. Pandeli raised the admission of this evidence as a separate issue, addressed infra ¶¶ 51-59.
. Walton
was overruled on other grounds by
Ring II,
. We have previously rejected the "dump-truck aggravation" argument; jurors may consider additional evidence presented in the penalty phase that bears on whether the defendant should be shown leniency.
Hampton,
. This argument mirrors the argument regarding the Iler photographs, addressed supra ¶¶ 24-26.
. Article 2, Section 23, states: "The right of trial by jury shall remain inviolate.” Article 2, Section 24, states: "In criminal prosecutions, the accused shall have the right to ... a speedy public trial by an impartial jury of the county in which the offense is alleged to have been committed. ...”
