Compiled by Citation Safe (Digital Empire Holdings LLC) from the court’s published sanction order (decided August 21, 2026). Quotes and case details come from the order itself — check the primary source before relying on them.

Sanction teardown · New Mexico SC, USA · 2026-08-21

Unspecified murder appeal (Las Cruces area)

What happened

In New Mexico SC, USA, a filing relied on ChatGPT to help draft legal argument. The court identified the following problems with the citations in that filing:

Fabricated (Exhibits & Submissions)

Brief referenced several nonexistent witnesses generated by ChatGPT; the court determined these witnesses did not exist.
False Quotes (Exhibits & Submissions)

Brief attributed fabricated testimony/quotations to at least one real witness that were generated by ChatGPT (false quotes).

Which AI tool

ChatGPT. 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

Found in contempt; removed from the case; Monetary Sanction; Briefs stricken and appeal to start anew; Bar Referral. (monetary penalty: 5000 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.santafenewmexican.com/news/local_news/new-mexico-high-court-blasts-lawyer-takes-him-off-case-for-ai-errors-in-brief/article_a162daf7-95a4-4010-a017-dedcbdb68b0b.html, via Damien Charlotin's public AI Hallucination Cases Database (CC0).