Incident Tracker / United States (federal)
Leonard Colbert v. County of Riverside
·U.S. District Court for the Central District of California·US-FEDWarningprovisional
On 2026-03-31, U.S. District Court for the Central District of California admonished counsel after finding a false statutory quotation and no supporting case, federal or state, for the quoted language. Counsel submitted an opposition brief with multiple nonexistent or misstated legal provisions, false quotations and fabricated or nonexistent authorities, including Mata v. Avianca, Inc.
- Court
- U.S. District Court for the Central District of California
- Date
- 2026-03-31
- Who used the AI
- Lawyer
- AI tool
- Not identified in the record
- Conduct
- The opposition brief used multiple nonexistent or misstated legal provisions, false quotations and fabricated or nonexistent authorities, including Mata v. Avianca, Inc, which the court found nonexistent, misquoted, or unsupported.
- Outcome
- Warning
- Penalty
- No monetary penalty recorded
- Regulatory outcome
- No separate regulatory disposition recorded
- Status
- Provisional — written by the court-decisions pipeline, awaiting the editor
- Last checked
- 2026-09-07
Primary sources for this incident
Related regulation records for this incident
No related regulation record has been linked to this incident yet.
Similar incidents on the record
- Williams v. Dallas-Fort Worth International Airport Board, No. 4:26-cv-00433-P (N.D. Tex.)2026-08-27 · US District Court, Northern District of Texas · WarningIn the Northern District of Texas, plaintiffs' counsel cited nonexistent and materially inapposite cases while trying to defeat qualified immunity. Judge Pittman called the effort borderline sanctionable, warned that ge…
- Shelbert v. Baxter International, Inc., No. 1:26-cv-06266 (N.D. Ill.)2026-08-26 · US District Court, Northern District of Illinois · WarningIn the Northern District of Illinois, Tyler Shelbert's lawyer filed a motion to strike that relied on a false reading of Instituto Nacional de Comercializacion Agricola. Chief Judge Kendall inferred AI-assisted drafting…
- Disruptive Resources, LLC v. Ballistic Barrier Products Inc., No. 1:24-cv-00321-JCG (D. Del.)2026-08-20 · US District Court for the District of Delaware (Judge Jennifer Choe-Groves, sitting by designation) · WarningIn a patent case in the US District Court for the District of Delaware, plaintiff's counsel promptly disclosed that a Strongsuit-assisted claim-construction brief contained errors. Judge Jennifer Choe-Groves discharged…
- Guerra-Quezada v. United States (with Guerra-Vasquez v. United States), Nos. 25-10372 and 25-10555 (5th Cir.)2026-08-14 · US Court of Appeals for the Fifth Circuit · WarningIn consolidated appeals by an uncle and nephew claiming US citizenship, the US Court of Appeals for the Fifth Circuit identified fabricated quotations and misattributed authorities in both briefs, including language att…
Cite this record
SafeLegalAI Global Legal AI Incident Tracker, “Leonard Colbert v. County of Riverside”, safelegalai.com/tracker/leonard-colbert-v-county-of-riverside (accessed 2026-09-08). Data: CC BY 4.0.