Estate of Allen v. City of Chicago does not exist — a fabricated AI citation

In John P. Chapman v. Officer Decker et al., defendants cited “Estate of Allen v. City of Chicago, No. 16-cv-8094, 2018 WL 4495982, at *4 (N.D. Ill. Sept. 19, 2018)” as supporting authority. The U.S. District Court for the Southern District of Illinois found this case does not exist — a clean fabrication with a full docket number and Westlaw identifier attached.

This fabricated citation did not appear alone. In the same brief, the defendants also cited three real, findable cases — Gutierrez v. Kermon, Williams v. Rodriguez, and Houskins v. Sheahan, all genuine Seventh Circuit civil-rights opinions — for propositions about de minimis injury and causation that the court found none of those decisions actually support as cited. That combination is a recurring signature across this database: one invented case sitting next to several real cases that are simply being asked to say more than they actually hold.

The docket number “No. 16-cv-8094” and the specific Westlaw pinpoint (“at *4”) give this fabrication an unusually convincing shape — the kind of granular, page-specific detail a careless reader takes as evidence of real verification rather than the opposite. Nothing about the specificity of a citation substitutes for actually opening it. Practically, this means a citation's apparent precision — a docket number, a page pinpoint, a parenthetical date — should never be treated as a proxy for having actually been checked; specificity is exactly what a fabrication is optimized to imitate.