# Lawyer fined $5K for submitting AI-generated fake witnesses in murder case New Mexico court holds attorney in contempt for unverified ChatGPT-generated legal brief - **Source:** [The Verge](https://www.theverge.com) - **Published:** 2026-09-11 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/736e84f5-0d7e-4dd0-8340-5a35890c1eb0 ## The case that exposed AI risks in law New Mexico's Supreme Court fined attorney Stephen Aarons $5,000 for submitting an appeal brief containing completely fabricated witnesses and false testimony about a shooter's appearance. The documents were generated by ChatGPT without proper verification. Justice C. Shannon Bacon expressed astonishment at Aarons' lack of awareness about AI risks, asking if he ever consumed news about the well-documented issue of AI hallucinations in legal practice. ## AI's dangerous legal hallucinations The brief included made-up witness testimonies and inaccurate descriptions of clothing and appearance - all invented by ChatGPT. This marks another high-profile case where AI-generated content entered official court proceedings. The filing specifically noted Aarons' failure to 'verify the factual claims and legal authority' in his AI-assisted work, highlighting a growing problem as more lawyers adopt these tools without proper safeguards. ## Judge's scathing courtroom remarks During an August hearing, Justice Bacon pointedly asked Aarons if he followed current events, noting that 'the problem with lawyers relying on AI hallucinations is an above-the-fold story every single day.' The justice's rhetorical questions about news consumption underscored how widely known these AI risks have become in legal circles, making Aarons' oversight particularly egregious. ## A pattern of AI misuse in law This isn't an isolated incident - last year, two law firms were sanctioned for submitting briefs with 'numerous false, inaccurate, and misleading legal citations' generated by AI. MyPillow CEO Mike Lindell's lawyers also faced fines for including AI-made misquotes. These cases demonstrate a troubling trend of legal professionals treating AI outputs as reliable without verification. ## The attorney's defense Aarons claimed his use of ChatGPT was 'an honest mistake' and expressed remorse in a statement to Reuters. He admitted thinking the AI would produce a 'bulletproof summary' of the trial, showing a fundamental misunderstanding of generative AI's limitations. This highlights the need for better education about AI's capabilities and risks within the legal profession. ## Growing adoption, growing problems As more attorneys incorporate AI tools into their workflow, courts are seeing increasing instances of fabricated citations and evidence. The New Mexico case involved particularly egregious fabrications - completely invented witnesses - showing how AI can generate persuasive but entirely fictional legal content that requires careful vetting. ## The challenge for legal ethics This incident raises important questions about professional responsibility when using AI. Lawyers have an ethical duty to verify all submitted materials, yet generative AI can produce convincing falsehoods. State bars and law schools may need to develop specific guidelines and training about appropriate AI use in legal practice to prevent similar occurrences. ## A watershed moment for AI in law The $5,000 fine and contempt ruling send a clear message about courts' stance on unverified AI use. As Justice Bacon noted, AI hallucination risks are now common knowledge, making such mistakes harder to excuse. This case will likely accelerate calls for formal standards governing AI's role in legal proceedings and attorney responsibilities when using these tools. ## Sources covering this story - https://www.theverge.com/ai-artificial-intelligence/994207/chatgpt-new-mexico-lawyer-fined-murder-appeal — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._