People v. Chambers, 47 N.E.3d 545

A search of defendant Chambers's residence, located at Parkside in Markham, uncovered cocaine, cannabis, cash, jewelry, and multiple firearms, following a warrant application based on a confidential informant.
Officer DeBois swore the informant had knowledge of narcotics activity at Parkside and had previously assisted in other cases; the warrant listed the informant as John Doe.
Chambers moved for a Franks hearing, alleging false statements in the warrant affidavit, including the informant's reliability and the officer's experience; affidavits from family and others supported alibi and falsehood claims.
The trial court granted a Franks hearing; the State sought reconsideration, arguing errors were typographical and that the informant appeared at the warrant proceeding, affecting Franks applicability.
A series of Franks motions followed, including a third motion relying on Copeland’s sworn statements alleging coercion and perjury; the trial court denied each motion under Gorosteata.
The appellate court held the case warranted a Franks hearing and remanded for credibility determinations; the Illinois Supreme Court reversed on the standard of review and overruled Gorosteata, ultimately recognizing a substantial preliminary showing warranting a Franks hearing.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Does informant’s presence at the warrant hearing preclude a Franks hearing?	State argues Gorosteata should apply; informant’s appearance forecloses Franks.	Chambers contends presence is not dispositive; substantial showing still possible.	No bright-line preclusion; presence is a factor, not controlling.
What standard governs review of a trial court’s Franks ruling on whether to hold a hearing?	Abuse-of-discretion standard should apply.	Franks-stage review is de novo; threshold showing is non-discretionary.	Franks ruling reviewed de novo; substantial preliminary showing assessed anew.
Did Chambers make a substantial preliminary showing that the affiant included false statements with reckless disregard?	Affidavits and evidence undermine probable cause; false statements shown.	Evidence insufficient or adequately explained; intentional falsehood not shown.	Copeland affidavit and alibi affidavits, taken together with other evidence, met the substantial preliminary showing.
Should Chambers be entitled to a Franks hearing based on the totality of the evidence?	Warrant affidavit’s probable cause supported despite some inconsistencies.	Alibi and coercion claims prove false statements were knowingly or recklessly included.	Yes; defendant entitled to a Franks hearing to determine truth and potential suppression of evidence.

Franks v. Delaware, 438 U.S. 154 (U.S. Supreme Court, 1978) (requires a hearing when a substantial showing of false statements affects probable cause)
Lucente v. Illinois, 116 Ill. 2d 133 (1987) (affidavits and showings beyond mere denials; informing framework for Franks analysis)
Gorosteata v. Illinois, 374 Ill. App. 3d 203 (2007) (bright-line rule that informant’s appearance forecloses Franks hearing rejected)
Caro v. Illinois, 381 Ill. App. 3d 1056 (2008) (informant testimony at warrant hearing does not automatically bar Franks hearing)
Phillips v. Illinois, 265 Ill. App. 3d 438 (1994) (informant credibility testing by magistrate discussed)
Franks v. Lucente (related discussion), See Lucente (1987) (framework for substantial preliminary showing and offer of proof)