New Mexico Supreme Court sanctions lawyer for AI-fabricated witness testimony
Attorney Stephen Aarons was fined $5,000 after using ChatGPT to generate fictional evidence in a murder appeal.
The New Mexico Supreme Court has held attorney Stephen Aarons in contempt and issued a $5,000 fine after he submitted a legal brief containing fabricated witness testimony generated by AI. The sanctions follow the discovery that Aarons used ChatGPT to summarize trial proceedings, resulting in the inclusion of fictional evidence in a high-stakes murder appeal.
The case involved the appeal of Oscar Renee Sandoval, who is serving a life sentence for the murder of the mother of his children. According to court findings, the AI-generated content included specific fictional details regarding the shooter's clothing, claiming the individual wore dark pants and a white shirt. The court determined that Aarons failed to verify the accuracy of the filing and demonstrated a lack of remorse for the submission. In addition to the fine, the court is referring Aarons to an attorney disciplinary board for further investigation.
A shift in AI legal failures
This incident reflects a broader, growing trend of legal professionals facing discipline for "AI hallucinations" in court filings. While previous sanctions in the legal industry have typically centered on fabricated case citations or misquoted statutes, this case is distinct because the AI fabricated actual factual evidence and witness testimony. This represents an escalation from citing non-existent law to inventing non-existent events within a criminal proceeding.
Professional risks in high-stakes litigation
The sanctions underscore the severe professional and legal risks associated with relying on generative AI for factual summaries in criminal law. The judiciary has signaled that the responsibility for verification remains solely with the attorney, regardless of the tools used to draft the documents. Justice C. Shannon Bacon highlighted the prevalence of these errors, asking Aarons if he followed the news, noting that the problem of lawyers relying on AI hallucinations is an "above-the-fold story every single day."
Future disciplinary actions
While Aarons described the incident as an "honest mistake" and a "lesson learned for all professionals who rely upon this powerful but sometimes unstable technology," the court's referral to the disciplinary board suggests further penalties may be pending. Legal observers will be watching the board's investigation to see if the fabrication of evidence in a murder case warrants more severe professional sanctions, such as suspension or disbarment, compared to previous AI-related errors.