New Mexico Lawyer Penalized for Using AI-Generated Fake Testimony

A defense attorney in New Mexico has publicly expressed surprise that an artificial‑intelligence system could produce false statements, after a recent case in which the lawyer’s client was impacted by an AI‑generated document. The attorney, who declined to be named, told reporters that the AI’s “hallucination” of facts—presenting invented details as if they were true—had caused confusion during the discovery process and ultimately led to a procedural setback for the client.

The incident occurred when the defense team used a commercial AI tool to draft a brief that was later submitted to the court. The court clerk flagged the document for containing factual inaccuracies that were not supported by the case record. The lawyer explained that the AI had generated dates, witness statements, and legal citations that did not exist, prompting the court to request a corrected version. The defense team has since paused the use of the tool pending a review of its output protocols.

Legal experts say the episode underscores the need for rigorous verification when employing AI in legal work. While AI can accelerate research and drafting, attorneys must remain vigilant to avoid inadvertent misrepresentations. The case is now proceeding with the corrected brief, and the lawyer has called for clearer guidelines on AI usage in court filings.