The New Mexico Supreme Court has taken disciplinary action against attorney Stephen Aarons, imposing a $5,000 fine and a contempt citation following the submission of a flawed legal brief. The filing, which was intended to support an appeal for a client’s murder conviction, was found to contain significant inaccuracies generated by artificial intelligence.

According to the court’s ruling, the brief included testimony from witnesses who do not exist, as well as fabricated details regarding the physical appearance and clothing of the shooter involved in the underlying criminal case. The court’s decision highlights a critical failure in the attorney's professional responsibility to verify the factual claims and legal authorities cited in his work. Justice C. Shannon Bacon expressed concern regarding how such a filing could be submitted without the attorney identifying the inaccuracies, emphasizing the necessity for lawyers to maintain oversight of the tools they use in legal practice.

This incident serves as a notable example of the risks associated with the integration of generative AI into the legal profession. While AI tools are increasingly used to assist in drafting documents and conducting research, the court’s ruling underscores that the ultimate responsibility for the veracity of legal filings rests entirely with the attorney. Aarons has been held accountable for failing to perform the necessary due diligence, a standard requirement for all legal practitioners regardless of the technology employed in the drafting process. The court's action serves as a warning to the legal community about the dangers of relying on unverified AI output in high-stakes litigation.