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Roman v. County of Los Angeles

Court
California SC
Jurisdiction
USA
Decided
2025-08-27
AI tool
Implied
Outcome
Warning
Monetary penalty
None reported

What was hallucinated

Fabricated: Case Law | Court found Plaintiff cited a non‑existent case titled 'Fairchild v. Park County (2000) 108 Cal.App.4th 1305'; court could not verify the case and noted it does not exist. || Fabricated: Case Law | Court found Plaintiff cited a non‑existent case titled 'Corgain v. Kmart Corp. (1989) 216 Cal.App.3d 1547'; court could not verify the citation and noted no such reported opinion exists. || Misrepresented: Case Law | Court noted Plaintiff cited existing cases (e.g., Krongos v. Pacific Gas & Electric Co.; Osborn v. Mission Ready Mix) but the authorities do not stand for the propositions cited in the opposition.

Sanction teardown · California SC, USA · 2025-08-27

Roman v. County of Los Angeles

What happened

In California SC, USA, a filing relied on an unnamed/unconfirmed AI tool to help draft legal argument. The court identified the following problems with the citations in that filing:

  • Fabricated (Case Law)
    Court found Plaintiff cited a non‑existent case titled 'Fairchild v. Park County (2000) 108 Cal.App.4th 1305'; court could not verify the case and noted it does not exist.
  • Fabricated (Case Law)
    Court found Plaintiff cited a non‑existent case titled 'Corgain v. Kmart Corp. (1989) 216 Cal.App.3d 1547'; court could not verify the citation and noted no such reported opinion exists.
  • Misrepresented (Case Law)
    Court noted Plaintiff cited existing cases (e.g., Krongos v. Pacific Gas & Electric Co.; Osborn v. Mission Ready Mix) but the authorities do not stand for the propositions cited in the opposition.

Which AI tool

an unnamed/unconfirmed AI tool. Note: Charlotin's public database records tool attribution only where a court order, brief, or reporting on the matter states it explicitly; "unidentified" or "implied" means the record indicates AI use but does not name a specific product — we do not guess.

Outcome

Warning

How Citation Safe would have caught this

Citation Safe runs three deterministic layers before a brief is filed: (1) does the citation exist against CourtListener's database of published opinions, (2) if quoted, does that exact language appear in the source, (3) does the cited case actually support the proposition it is cited for. Fabricated case citations fail Layer 1. Fabricated or misattributed quotations fail Layer 2 even when the underlying case is real. Misrepresented holdings — a real case cited for a proposition it does not support — are the target of Layer 3. None of these checks involve asking another language model whether the citation looks right; they are lookups and text-matches against the actual source, which is why a hallucinated citation has to survive a direct lookup against the authoritative source — not another model's opinion — to earn a VERIFIED stamp; our measured false-verify rate is published live at /quality.

Check a brief before you file it → · See our live false-verify rate

Source: https://www.damiencharlotin.com/documents/2355/28_-_Roman_v_County_of_Los_Angeles.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

Source: https://www.damiencharlotin.com/documents/2355/28_-_Roman_v_County_of_Los_Angeles.pdf

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