OPINION
HOWE, Judge:¶ 1 In this petition for special action arising from a capital murder case, Sammantha and John Allen challenge the trial court’s refusal to independently determine whether probable cause exists for child abuse offenses that the State has alleged are aggravating circumstances for sentencing purposes. We accept jurisdiction because the Allens have no adequate remedy by appeal, Ariz. R. P. Spec. Act. 1(a), and the issue is a purely legal question of first impression and statewide importance, Azore, LLC v. Bassett, 236 Ariz. 424, 426 ¶ 2, 341 P.3d 466, 468 (App. 2014).
¶ 2 The Allens argue that under the Arizona Supreme Court’s decision in Sanchez v. Ainley, 234 Ariz. 250, 321 P.3d 415 (2014), the trial court should have independently determined probable cause on the alleged aggravating circumstances related to the concurrently alleged child abuse offenses, *362rather than giving “conclusive effect” to the grand jury’s probable cause determination on the child abuse offenses on which the circumstances are based. Because Sanchez requires the trial court to make its own independent probable cause determination on the alleged aggravating circumstances, we accept jurisdiction and grant relief.
FACTS AND PROCEDURAL HISTORY
¶ 3 In July 2011, Sammantha called 911 and reported that A.D., her 10-year-old niece, was dead. Investigators were initially told that A.D. had locked herself up in a box while playing hide-and-seek, but evidence indicated that A.D. had been purposely locked in the box. A grand jury indicted, as relevant here, Sammantha and John for first-degree murder, Sammantha for two counts of child abuse for allegedly placing AD. in the box on one occasion and placing A.D. in the box and throwing it around on another occasion, and John for one count of child abuse for allegedly placing A.D. in the box and throwing the box on another occasion.
¶ 4 The State filed notices of intent to seek the death penalty for both Sammantha and John, alleging several aggravating circumstances. The State alleged that the counts of child abuse filed separately against Sammantha and John constituted aggravating circumstances under A.R.S. § 13—751(F)(2). That statute provides, as relevant here, that convictions for serious offenses not committed on the same occasion as a homicide but consolidated for trial with the homicide constitute aggravating circumstances for determining whether the death penalty should be imposed as punishment for the homicide. Id. A conviction for child abuse, a dangerous crime against children, A.R.S. § 13-3623(A)(1), is by definition a “serious offense,” A.R.S. § 13-751(J)(6).
¶ 5 Pursuant to Chronis v. Steinle, 220 Ariz. 559, 208 P.3d 210 (2009), the trial court conducted a hearing to determine whether probable cause supported the alleged aggravating circumstances. At the hearing, the Allens objected to the trial court’s using the grand jury’s finding of probable cause for the child abuse offenses to satisfy the probable cause determination for the aggravating circumstances. The Allens relied upon Sanchez, in which the Arizona Supreme Court held that the trial court must grant a defendant’s request for a Chronis hearing even if the grand jury has made a previous probable cause determination on the State’s alleged aggravating circumstances. 234 Ariz. at 254 ¶¶ 13-14, 321 P.3d at 419. The trial court distinguished Sanchez, however, concluding that the grand jury’s finding of probable cause on the child abuse offenses was sufficient to establish probable cause regarding those charges. Therefore, the court reasoned, because the offenses were “serious offenses” under A.R.S. § 13—751(J), probable cause existed to proceed on the aggravating circumstances of previous convictions for serious offenses. Sammantha petitioned for special action review; John has joined.1
DISCUSSION
¶ 6 The Allens argue that the trial court erred in not independently determining whether probable cause supported the child abuse offenses as alleged aggravating circumstances rather than giving conclusive effect to the grand jury’s probable cause determination regarding the child abuse offenses of the indictment. We review de novo the interpretation of court rules, applying principles of statutory construction. State v. Whitman, 234 Ariz. 565, 566 ¶ 5, 324 P.3d 851, 852 (2014). Here, as Sanchez requires, the trial court must independently determine whether probable cause supported the child abuse offenses as aggravating circumstances alleged in this capital murder case for sentencing purposes.
*363¶ 7 In Chronis, the Arizona Supreme Court held that “Arizona Rule of Criminal Procedure 13.5(c) permits a defendant in a capital murder ease to request a determination of probable cause as to alleged aggravating circumstances.” 220 Ariz. at 560 ¶ 1, 208 P.3d at 211. In Sanchez, the Court expanded on Chronis and held that “the trial court must grant a defendant’s timely request for a hearing under Rule 13.5(c), even if the grand jury has previously made a probable-cause determination as to those alleged aggravating circumstances.” 234 Ariz. at 252 ¶ 1, 321 P.3d at 417. The Court stated that no statute or rule authorized a grand jury to determine whether probable cause supported aggravating circumstances alleged in capital cases. Id. at 253-54 ¶ 13, 321 P.3d at 418-19. The Court reasoned that grand jurors are authorized to inquire into offenses and return indictments for public offenses, but “ ‘aggravating circumstances’ do[ ] not fall within this definition because they merely guide sentencing determinations and do not proscribe conduct that is punishable by a term of imprisonment or fine.” Id. at 253 ¶ 8, 321 P.3d at 418. However, the Court emphasized that “even if the grand jury were authorized to determine that probable cause supports alleged aggravators, [a defendant] would be entitled to a Chronis hearing” because a capital defendant’s right “to challenge the legal sufficiency of an aggravator is neither conditioned on whether a grand jury has addressed the aggravator nor affected by the grand jury’s findings.” Id. at 254 ¶ 14, 321 P.3d at 419.
¶8 Because grand jury findings do not affect a capital defendant’s right to challenge the legal sufficiency of evidence supporting the allegation of aggravating circumstances, the trial court must make an independent probable cause determination on aggravating circumstances. The trial court here did not do so and instead accepted the grand jury’s probable cause determination on the child abuse offenses as a probable cause determination on the “serious offense” aggravating circumstances. This contradicts the supreme court’s holding in Sanchez.
¶ 9 We recognize that this may be procedurally burdensome and inefficient for the State. The State will often present to the trial court the same evidence to support probable cause for the aggravating circumstance that it presented to the grand jury to support probable cause for the underlying offense. Nevertheless, Sanchez requires this procedure, “reflecting th[e Arizona Supreme] Court’s objective to afford greater procedural rights to a defendant facing the death penalty,” 234 Ariz. at 254 ¶ 15, 321 P.3d at 419, and it must be followed. Following the Sanchez-mandated procedure gives a capital defendant the opportunity to review the evidence the State presents to support probable cause on the aggravating circumstances, to cross-examine witnesses, and to present rebuttal evidence—an opportunity not available in grand jury proceedings. Id. This opportunity means nothing, however, if the trial court does not then independently determine probable cause. Consequently, the trial court denied the Allens the benefit of a Chronis hearing on the “serious offense” aggravating circumstances.
¶ 10 The trial court attempted to distinguish Sanchez on grounds that (1) Sammantha and John were afforded a Chronis hearing; (2) the grand jury here did not previously find probable cause on the child abuse offenses as alleged aggravating circumstances; and (3) Sanchez does not allow a defendant to have the trial court redetermine a grand jury’s probable cause determination on public offenses. The trial court’s distinctions, however, do not alter Sanchez's specifically articulated holding that grand jury determinations of probable cause do not satisfy a capital defendant’s right to have the trial court independently determine probable cause on aggravating circumstances. First, simply providing the Allens a Chronis hearing does not satisfy Sanchez if the trial court does not independently determine probable cause on aggravating circumstances. Second, although the grand jury determined probable cause on the child abuse offenses as public offenses and not as aggravating circumstances, this does not alter the trial court’s duty under Sanchez to independently determine whether probable cause supported the offenses as *364aggravating circumstances. Third, although the grand jury found probable cause on the alleged public offenses of child abuse, the Allens are not seeking the redetermination of the grand jury’s findings, but the trial court’s determination in the first instance— as Sanchez requires—whether probable cause supports the aggravating circumstances. A capital defendant has the right to require the trial court to determine probable cause on aggravating circumstances in a Chronis hearing, even if the circumstances also constitute public offenses that have been subject to a grand jury’s probable cause determination.
¶ 11 The State counters that the trial court had sufficient evidence to find probable cause for the child abuse offenses as alleged aggravating circumstances and that the court properly did so. But this argument fails because the trial court’s ruling explicitly stated that the court was accepting the grand jury’s probable cause determination. Specifically, the court stated the “grand jury’s finding of probable cause respecting [the child abuse offenses] of the Indictment is sufficient to establish probable cause respecting those charges and because they are ‘serious offenses’ under the statute, the Court finds there is probable cause to proceed on the aggravating factor of a ‘prior serious offense.’ ” Consequently, because the trial court gave conclusive effect to the grand jury’s probable cause determination for the child abuse offenses, instead of independently determining whether probable cause supported the child abuse offenses as aggravating circumstances for sentencing purposes in this capital case, the trial court erred.
¶ 12 Our dissenting colleague contends that the trial court committed no error in declining to apply Sanchez to this case and in not independently determining probable cause on the “serious offense” aggravating circumstances. Our colleague distinguishes Sanchez in two ways. He argues first that unlike the facts of Sanchez, the grand jury here acted within its proper role, determining probable cause for the public offenses of child abuse, not probable cause for capital aggravating circumstances. See infra at ¶ 21. He argues second that unlike the trial court in Sanchez, the trial court here did not simply rely upon the grand jury’s probable cause determination of child abuse to find that the child abuse offenses were “serious offense” aggravating circumstances, it also independently determined that the child abuse offenses were “serious offenses” under AR.S. § 13-751(J). See infra at ¶22. These distinctions, however, do not take this case outside Sanchez's ambit.
¶ 13 The similarity between Sanchez and this ease is not based upon what the respective grand juries found probable cause on, but upon what the respective trial courts did with those findings once the grand juries made them. In Sanchez, the trial court found that the grand jury’s probable cause determination on the alleged aggravating circumstances relieved it of its independent duty under Chronis to determine probable cause on the aggravating circumstances. Sanchez, 234 Ariz. at 252 ¶ 4, 321 P.3d at 417. In this case, the trial court found that the grand jury’s probable cause determination on the child abuse offenses relieved it of its independent duty under Chronis to determine probable cause on the aggravating circumstances for being previously convicted of “serious offenses.” But the Arizona Supreme Court ruled in Sanchez that the trial court’s refusal to independently determine probable cause on the aggravating circumstances denied the capital defendant due process under Chronis. Sanchez, 234 Ariz. at 254 ¶ 14, 321 P.3d at 419 (“A capital defendant’s right under Rule 13.5(c) to challenge the legal sufficiency of an aggravator is neither conditioned on whether a grand jury has addressed the aggravator nor affected by the grand jury’s findings.”). Accordingly, just as in Sanchez, the trial court’s refusal here to independently determine whether probable cause supported the “serious offense” aggravating circumstances denied the Allens due process.
¶ 14 The trial court’s “finding” (as our colleague characterizes it, see infra at ¶25) that the child abuse convictions were “serious offenses” does not take this ease away from Sanchez because the trial court made no independent finding. Section 13—751(J) lists the offenses that qualify as “serious of*365fenses,” and “any dangerous crime against children”—which includes child abuse, A.R.S. § 13-3623(A)(1)—is on that list. AR.S. § 13-751(J)(6). A child abuse offense by legislative definition is a “serious offense,” and the trial court exercised no independent factual or legal judgment in recognizing that the child abuse offenses were “serious offense” aggravating circumstances under AR.S. § 13-751(F)(2). Our colleague’s view, thus, does not change the conclusion that the trial court denied the Allens due process by failing to independently determine whether probable cause supported those aggravating circumstances.
CONCLUSION
¶ 15 For the foregoing reasons, we accept jurisdiction and grant relief. We also lift this Court’s previously ordered stay.
. The State has opposed John’s joinder, arguing that no rule under the Arizona Rules of Procedure for Special Actions allows him to join in the action. But Rule 2 grants the court discretion in determining the parties in a special action, and Rule 2(b) specifically allows the court to "order [other persons’] joinder as parties.” Ariz. R. P. Spec. Act. 2. Consequently, we grant John’s request to join and deny the State's motion to strike. Moreover, we have amended the caption to reflect that John is a party in this action.