Background
In September 2021, Kane County sheriff’s detective Luke Weston stopped a vehicle on I-90 for traffic violations. Terry Collins, a back-seat passenger, rolled down his window, and Weston detected the smell of cannabis. A search of the trunk revealed a loaded firearm. Prosecutors charged Collins with aggravated unlawful use of a weapon (AUUW) based on carrying a gun without a valid FOID card (count I), possession of a firearm without a FOID card (count III), and unlawful possession of a weapon by a felon (UPWF) (count IV), among other charges later dismissed.
Collins moved to sever the UPWF count from the remaining charges to prevent the jury from learning of his prior felony conviction in the trial on the other counts. The circuit court granted the unopposed motion. At the UPWF trial, the parties stipulated to Collins’s prior felony conviction, leaving gun possession as the sole contested fact. The jury acquitted Collins. He then moved to dismiss the AUUW and FOID counts, arguing the jury’s implicit finding that he did not possess the firearm precluded the State from re-proving possession at any subsequent trial. The circuit court dismissed the FOID count but denied dismissal of the AUUW count, reasoning that “carrying” a firearm was a different element than “possessing” one.
The appellate court reversed, holding that issue preclusion barred prosecution of the AUUW count as well, because “carrying” necessarily requires possession. The Illinois Supreme Court granted the State’s petition for leave to appeal, with the State arguing that the United States Supreme Court’s decision in Currier v. Virginia, 585 U.S. 493 (2018), required Collins to forfeit any issue-preclusion defense by virtue of his own motion to sever.
The Court’s Holding
The Illinois Supreme Court unanimously affirmed the appellate court. Chief Justice Neville, writing for the court, held that Currier establishes only a federal constitutional floor and has no bearing on Illinois’s independent common-law or statutory issue-preclusion protections. Illinois has recognized the doctrine of issue preclusion—sometimes called “estoppel by verdict” or collateral estoppel—for more than 140 years, and the General Assembly separately codified it in section 3-4(b)(2) of the Criminal Code of 2012, 720 ILCS 5/3-4(b)(2), nine years before the United States Supreme Court even held issue preclusion to be a federal constitutional requirement in Ashe v. Swenson (1970). States are free to provide defendants greater protection than the federal floor, and Illinois has done so.
The court also rejected the State’s argument that Collins waived issue preclusion by moving to sever. Section 3-4(b)(2) bars subsequent prosecution when a prior proceeding terminated with a determination inconsistent with a fact necessary to conviction in the later case. The statute enumerates specific exceptions—none of which involves severance. The court declined to read a severance-based exception into unambiguous statutory text. Because the only contested issue at the UPWF trial was whether Collins possessed the firearm, the jury’s general verdict of acquittal necessarily embodied a finding that he did not. Since possession is a required component of “carrying” for AUUW purposes, the State is foreclosed from relitigating that fact.
The court further clarified that “carry” means to possess and transport, citing Black’s Law Dictionary and Seventh Circuit precedent, so proof of AUUW unavoidably requires re-proving the very possession issue the UPWF jury resolved in Collins’s favor. With that element foreclosed, the State cannot establish the AUUW charge as a matter of law, and dismissal was required.
Key Takeaways
- Illinois’s statutory issue-preclusion bar (720 ILCS 5/3-4(b)(2)) is an independent state-law protection broader than the federal double jeopardy clause; Currier v. Virginia does not limit its reach.
- A defendant’s motion to sever does not waive the right to assert issue preclusion under Illinois common law or section 3-4(b)(2), because the statute’s enumerated exceptions do not include severance and courts may not add exceptions the legislature omitted.
- Where a general acquittal verdict can only be explained by a finding on a single contested fact, that factual determination is conclusive and bars any subsequent prosecution in which the same fact is a necessary element of the offense.
- “Carrying” a firearm requires possession as a predicate, so an acquittal based on non-possession precludes a later AUUW charge that depends on carrying the same weapon.
Why It Matters
This decision reinforces that Illinois defendants retain robust issue-preclusion rights even after consenting to severance—a significant departure from the federal rule announced in Currier. Prosecutors who agree to or do not oppose a defendant’s motion to sever closely related weapons charges risk losing the ability to try the remaining counts if the first trial results in an acquittal on a shared factual element. Defense practitioners should treat acquittals resolving core contested facts as potential shields against all pending charges that share that element, regardless of how the trial was structured.
More broadly, the decision is a pointed reminder that states operate their own issue-preclusion regimes independent of federal constitutional doctrine. Because Illinois enacted section 3-4(b)(2) before Ashe constitutionalized issue preclusion in 1970, the court held that subsequent federal retreats from that doctrine—culminating in Currier—simply have no purchase on the Illinois statute or on the state’s longstanding common-law tradition. The ruling may encourage defense attorneys in Illinois to be more deliberate about sequencing trials in multi-count prosecutions and more aggressive in filing issue-preclusion motions after favorable verdicts.