New Mexico Supreme Court Fines Lawyer $5,000 for AI‑Generated False Testimony in Murder Appeal

New Mexico's Supreme Court fined attorney Stephen Aarons $5,000 and held him in contempt after he submitted an appeal brief that contained AI‑generated, fabricated witnesses and false testimony about the shooter's clothing. The court said Aarons failed to verify the factual claims and legal authority in the brief, which included entirely invented witnesses and incorrect details about the shooter's appearance. Justice C. Shannon Bacon questioned how Aarons was unaware of the risks posed by AI during an August hearing. The decision follows a growing concern that artificial intelligence can produce hallucinated evidence that, if unverified, can mislead courts. By penalizing the lawyer, the court reinforced the duty of attorneys to fact‑check AI‑generated content before filing it with the court.