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Oscar Brownfield v. Cherokee County School District No. 35

Court
E.D. Oklahoma
Jurisdiction
USA
Decided
2026-03-19
AI tool
Unidentified
Outcome
Sanctions Motion denied
Monetary penalty
500 USD

What was hallucinated

Fabricated: Case Law | Defendants identified eight cited cases in Plaintiff's Sanctions Motion as non-existent (AI-generated fictitious cases); Court found submission of fictitious cases violated Rule 11. || Misrepresented: Case Law | Several other cited authorities did not stand for the legal propositions cited or did not contain the quoted language, i.e., misrepresented/inaccurate case authority generated by AI.

Sanction teardown · E.D. Oklahoma, USA · 2026-03-19

Oscar Brownfield v. Cherokee County School District No. 35

What happened

In E.D. Oklahoma, 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)
    Defendants identified eight cited cases in Plaintiff's Sanctions Motion as non-existent (AI-generated fictitious cases); Court found submission of fictitious cases violated Rule 11.
  • Misrepresented (Case Law)
    Several other cited authorities did not stand for the legal propositions cited or did not contain the quoted language, i.e., misrepresented/inaccurate case authority generated by AI.

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

Sanctions Motion denied (monetary penalty: 500 USD.)

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/1766/Brownfield_v._Cherokee_USA_18_March_2026.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

Source: https://www.damiencharlotin.com/documents/1766/Brownfield_v._Cherokee_USA_18_March_2026.pdf

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