A New Mexico attorney, Stephen Aarons, has been fined $5,000 and held in contempt by the state's Supreme Court. This action stems from a legal brief he submitted for a murder conviction appeal. The brief contained fabricated police testimony and witnesses that were generated by OpenAI's ChatGPT. Aarons admitted to using the AI program to help summarize trial proceedings for the appeal. He stated he was unaware of the extent to which AI could "hallucinate" facts. The court expressed incredulity at his lack of awareness regarding AI's potential for error. This incident is part of a growing trend of lawyers facing sanctions for AI-generated misinformation in legal filings. Aarons' case is particularly concerning as it involved invented witness testimony in a criminal appeal. The court plans to refer him to an attorney disciplinary board for further investigation.