In this appeal we consider whether Vicky Chao’s three felony murder convictions must be reviewed in light of the recent decision in Williams v. State1. In Williams, this Court held that the felony murder statute “not only requires that the murder occur during the course of the felony but also that the murder occur to facilitate commission of the felony.”2 The Williams Court expressly overruled a portion of our earlier decision on Chao’s direct appeal, which adopted a contrary interpretation of the “in furtherance of’ felony murder statute’s language.3 We conclude that in the interest of justice, Williams must be applied retroactively, because Chao may have been convicted for acts that do not constitute felony murder. Accordingly, we remand to the Superior *1001Court for further proceedings on Chao’s motion for postconviction relief.
Factual and Procedural Background
In 1988, an arson fire killed three members of William Chen’s family. In 1989, Chao was convicted of three counts of intentional murder, three counts of felony murder, and other related offenses arising out of that arson fire. At that time, the felony murder statute provided that one is guilty of first degree murder “when ... in the course of and in furtherance of the commission ... of a felony or immediate flight therefrom, the person recklessly causes the death of another person.”4
Chao appealed, arguing that there was insufficient evidence to support her felony murder convictions because the killings were not “in furtherance of’ the arson. This Court rejected her argument and affirmed the convictions:
[Chao] claims that ... no rational juror could infer that the killings were caused “in furtherance of the commission” of arson, a felony. Rather, she asserts that the evidence points towards arson as being the instrumentality or means by which the intentional murders were accomplished.... [Chao’s] argument is found to be without merit.
[T]he inclusion of the phrase “in furtherance” as used throughout §§ 636 and 635 was not meant to require that the killing be committed as an incident to an underlying felony. On the contrary, for felony murder liability to attach, a killing need only accompany the commission of an underlying felony. Thus, if the “in furtherance” language has any limiting effect, it is solely to require that the killing be done by the felon him or herself.5
In 1995, after concluding that Chen had given perjured testimony at the first trial, the Superior Court granted Chao’s post-conviction motion for a new trial. In the second trial, the jury convicted Chao of three counts of felony murder, arson, and second degree conspiracy; and acquitted Chao on the three intentional murder charges. On direct appeal, this Court again affirmed the convictions in 2001.6
In 2003, the Court revisited, in Williams, the meaning of the “in furtherance of’ language in the felony murder statute. We held:
In our view, the statutory language of the Delaware felony murder statute not only requires that the murder occur during the course of the felony but also that the murder occur to facilitate commission of the felony. To the extent that the Chao opinion states that the “in furtherance of’ language of the statute addresses solely the identity of the person who is committing the actual killing, it is overruled.7
In 2004, Chao filed another postconviction motion, asking that her felony murder convictions be vacated under Williams. The Superior Court summarily rejected her motion. Chao appealed, and this Court remanded the case for the trial court to consider, in the first instance, whether to apply Williams retroactively. On remand, the Superior Court concluded that Chao’s felony murder convictions must be reconsidered because Chao “has been convicted of acts that no longer lawfully constitute a *1002crime under the new law established in Williams .8
Discussion
In Flamer v. State,9 this Court addressed the legal principles that govern our analysis in this case:
Under Rule 61(i)(4), any ground for relief which has already been adjudicated is barred unless reconsideration of the claim is warranted in the interest of justice.... In order to invoke the “interest of justice” provision ... a movant must show that subsequent legal developments have revealed that the trial court lacked the authority to convict or punish him.10
Following the United States Supreme Court’s analysis in Teague v. Lane11, this Court adopted a “general rule of non-ret-roactivity” for postconviction changes to rules of criminal procedure.12 But, the Flamer Court also relied on Davis v. United States,13 where the United States Supreme Court held that new substantive decisions will be applied retroactively when a defendant has been convicted for acts that are not criminal:
In this case, the petitioner’s contention is that the decision in Gutknecht v. United States[, 396 U.S. 295, 90 S.Ct. 506, 24 L.Ed.2d 532 (1970) ] ... establishes that his induction order was invalid ... and that he could not be lawfully convicted for failure to comply with that order. If this contention is well taken, then Davis’ conviction and punishment are for an act that the law does not make criminal. There can be no room for doubt that such a circumstance ‘inherently results in a complete miscarriage of justice’ and ‘present(s) exceptional circumstances’ that justify collateral relief under § 2255 [the federal postconviction relief statute].14
The Superior Court carefully and correctly applied this principle, finding that Williams must be applied retroactively and that Chao’s conduct did not constitute the crime of felony murder under Williams.
In arguing against this result, the State urged this Court to consider the impact its decision will have on others who were convicted of felony murder. The State points out that, “[r]egardless of whether such defendants committed felony murder under Williams, they are hardly ‘innocent’ in the usual sense of the word.”15 Although this Court is not unmindful of the State’s concern, we will not withhold justice because of the possible repercussions from a correct application of the law. The Court asked the State to provide a complete list of all inmates who might be affected by the retroactive application of Williams. The list, a copy of which is attached and entitled “APPENDIX”, reveals that almost all prisoners who were convicted of felony murder were also convicted of other crimes and will continue to serve signifi*1003cant sentences, even if this decision impacts them.
Finally, we note that several issues remain to be decided. Although Chao’s felony murder convictions must be vacated under Williams, the Superior Court may determine that Chao should be resen-tenced on the lesser-included charges of manslaughter.16 In addition, “[a]fter a related sentence has been vacated on appeal, a trial judge may resentence a defendant up to the combined duration of the original sentences without violating the constitutional provision against double jeopardy.” 17 These are issues for the Superior Court to address in resolving Chao’s post-conviction motion.
Conclusion
Based on the foregoing, this matter is remanded to the Superior Court for further action in accordance with this decision. Jurisdiction is not retained.
. 818 A.2d 906 (Del.2003).
. 818 A.2d at 913.
.Chao v. State, 604 A.2d 1351, 1363 (Del.1992).
.11 Del.C. § 636(a)(2). The statute has been amended, and now provides that a person is guilty of first degree murder "when ... while engaged in the commission of ... any felony, the person recklessly causes the death of another person.” 2004 Del. Laws Ch. 246, § 2.
. Chao v. State, 604 A.2d at 1363.
. Chao v. State, 780 A.2d 1060 (Del.2001).
. Williams v. State, 818 A.2d at 913.
. State v. Chao, 2006 WL 2788180 at *8 (Del.Super.) The Superior Court also decided, at this Court’s request, that the Slate is not estopped from arguing against the retroactive application of Williams.
. 585 A.2d 736 (Del.1990).
. 585 A.2d at 746.
. 489 U.S. 288, 109 S.Ct. 1060, 103 L.Ed.2d 334(1989), reh’g denied 490 U.S. 1031, 109 S.Ct. 1771, 104 L.Ed.2d 206 (1989).
. 585 A.2d at 749.
. 417 U.S. 333, 94 S.Ct 2298, 41 L.Ed.2d 109 (1974).
. Id. at 346-347, 94 S.Ct. 2298.
. Supplemental Memorandum for the State of Delaware, at 4.
. See: Kirk v. State, 889 A.2d 283 (Del.2005).
. White v. State, 576 A.2d 1322, 1328 (Del.1990).