Lawyer Files ChatGPT’s False Claims in Murder Appeal

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Chatbots often hallucinate facts, a well-known limitation that has now surfaced in court after a lawyer trusted the technology. Image: Unsplash

A New Mexico lawyer filed ChatGPT-generated false claims in a murder appeal, resulting in contempt, a $5,000 sanction, and disciplinary proceedings.

Sep 14, 2026

A lawyer turned to ChatGPT for help with a murder appeal, and the AI got him into trouble.

New Mexico defense attorney Stephen Aarons used ChatGPT while preparing an appeal for a client convicted of murder and sentenced to life in prison. But when the material entered the court record, several claims were clearly inaccurate. The New Mexico Supreme Court said the brief contained fabricated witnesses, false testimony, and other inaccurate claims.

The bigger problem was not simply that ChatGPT got the facts wrong: It generated details that were not in the case record, and Aarons submitted them without checking. The court held him in...

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