by David Kim

The Supreme Court of Illinois unanimously held that issue preclusion under both Illinois common law and § 3-4(b)(2) of the Criminal Code of 2012 affords criminal defendants protections surpassing those guaranteed by the federal Double Jeopardy Clause. The Court rejected the State’s contention that Currier v. Virginia, 585 U.S. 493 (2018), requires Illinois courts to interpret their common law and statutory issue preclusion doctrines in lockstep with the federal constitutional framework. Because § 3-4(b)(2) contains no exception for cases in which the defendant moved to sever related charges and because the record revealed no knowing relinquishment of the right to invoke issue preclusion, the Court affirmed the appellate court’s judgment barring prosecution of the aggravated unlawful use of a weapon (“AUUW”) count following an acquittal on a closely related unlawful possession of a weapon by a felon (“UPWF”) count.

Background

In September 2021, a Kane County detective stopped a vehicle on I-90 for traffic violations. Terry Collins was a passenger in the back seat. After detecting the odor of cannabis, the detective searched the vehicle and recovered a loaded firearm from a bag in the trunk. Collins was subsequently charged with AUUW for carrying a gun in a vehicle without a valid Firearm Owners Identification (“FOID”) card (“Count I”), possession of a firearm without an FOID card (“Count III”), and UPWF (“Count IV”). Collins moved to sever the UPWF count to prevent the jury from learning of his prior felony, and the circuit court granted the unopposed motion.

At the UPWF trial, the parties stipulated to Collins’ prior felony conviction and informed the jury that firearm possession was the sole question for its determination. The jury acquitted him. Collins then moved to dismiss Counts I and III, arguing that the acquittal resolved the possession question in his favor and both remaining charges depended on proof of the same fact. The circuit court dismissed the FOID count but denied the motion as to the AUUW count, reasoning that AUUW required proof of “carrying” rather than “possessing.” The appellate court reversed, concluding that issue preclusion barred prosecution of the AUUW charge.

Analysis

The Court reviewed the lower courts’ rulings de novo, as the case turned solely on the legal question of whether issue preclusion applied to undisputed facts.

The State’s principal argument rested on Currier, in which the U.S. Supreme Court held that a defendant who consents to severing charges may not later invoke the Double Jeopardy Clause to block a subsequent prosecution through issue preclusion. The Illinois Supreme Court recognized that Currier sets a federal constitutional baseline but stated that it does not constrain state interpretation of independent legal authorities. Currier itself acknowledged that the “proper authorities, the States and Congress, are empowered to adopt new laws or rules experimenting with issue or claim preclusion in criminal cases if they wish,” the Court observed.

The Court framed issue preclusion as part of Illinois’ common law tradition, tracing the doctrine back more than 140 years to Hanna v. Read, 102 Ill. 596 (1882). The Court explained that when a specific factual question has been adjudicated between the same parties, that resolution “will be held conclusive upon the parties in the latter suit, without regard to whether the cause of action is the same in both suits or not.” Id. The Hanna Court based this principle on the twin demands of justice and public policy, instructing that matters “solemnly adjudicated by a court of competent jurisdiction, shall be deemed finally and conclusively settled in any subsequent litigation between the same parties, where the same question or questions arise.” The Court explained that Illinois has long extended this doctrine to criminal proceedings. People v. Haran, 188 N.E.2d 707 (Ill. 1963). It further explained that common law carries the same binding force as statutory law in Illinois, and common law rights remain operative unless expressly repealed by the legislature or modified by court decision. Kreitz v. Behrensmeyer, 36 N.E. 983 (Ill. 1894).

The Court noted that the General Assembly codified issue preclusion in 1961, nearly a decade before the U.S. Supreme Court recognized the doctrine as a component of federal double jeopardy in Ashe v. Swenson, 397 U.S. 436 (1970). See 1961 Ill. Laws 1983 (§ 3-4). The statute bars a subsequent prosecution when the former prosecution “was terminated by a final order or judgment ... that required a determination inconsistent with any fact necessary to a conviction in the subsequent prosecution.” By enacting this provision, the General Assembly created an independent form of estoppel operating outside the constraints imposed on the federal Double Jeopardy Clause, the Court concluded. Thus, the Court ruled that the limitations in Currier have no bearing on either the common law doctrine or the statutory provision.

The Court found it particularly significant that the statute contains no severance exception. While § 3-4(d) enumerates specific circumstances that defeat the statutory bar, such as lack of jurisdiction or a prosecution obtained by the defendant to evade a harsher sentence, no provision addresses a defendant’s request to try charges separately. The Court declined to graft onto the statute a limitation the legislature never adopted, invoking the principle that courts may not read into a statute “exceptions, limitations, or conditions that the legislature did not express.” People v. Washington, 226 N.E.3d 1218 (Ill. 2023).

The Court determined that firearm possession was the only genuinely disputed factual issue at Collins’ UPWF trial. Because the parties had stipulated to the felony-conviction element, the jury’s acquittal necessarily resolved the possession question in Collins’ favor, the Court concluded. The AUUW charge required proof that Collins “knowingly carried” a firearm in a vehicle, which the Court explained requires demonstrating both possession and transportation. Because possession is a necessary component of carrying, the State could not establish the AUUW offense without relitigating the very fact the jury had already decided.

Conclusion

Accordingly, the Court affirmed the appellate court’s judgment reversing the circuit court’s order that had denied Collins’ motion to bar prosecution of the AUUW count. See: People v. Collins, 2026 Ill. LEXIS 386 (2026).  

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