TLDR: A lawyer, Ms. Hamilton, has been sanctioned by a federal judge in Louisiana for submitting legal citations generated by an AI-assisted research tool, Westlaw Precision, that were found to be entirely fabricated. The attorney admitted to mistakenly verifying the citations and misrepresenting their origin, highlighting the critical need for independent verification of AI-generated legal research.
A recent ruling by Judge Susie Morgan of the U.S. District Court for the Eastern District of Louisiana has resulted in sanctions against attorney Ms. Hamilton for presenting fabricated legal citations in a court filing. The case, Nora v. M & A Transport, Inc., brought to light the dangers of unverified AI-assisted legal research.
The issue arose after Ms. Hamilton, representing the plaintiff, filed a Motion to Transfer Venue on June 30, 2025. On July 8, 2025, the defendants, M & A Transport, LLS Leasing, Linda Stivason, and Mike Stivason, filed an opposition, pointing out three ‘suspicious’ citations within Ms. Hamilton’s motion. These citations included references to cases such as ‘Gallagher v. Wilton Enterprises, Inc.’ and ‘Mader v. Advanced Neuromodulation Sys., Inc.’, which the court’s subsequent research confirmed were either non-existent or misrepresented in their content and citation details.
Upon the court’s inquiry on July 21, 2025, Ms. Hamilton was ordered to provide the AI-assisted research history. She disclosed that she was unable to do so because the lawyer who initially produced these AI-generated citations was currently suspended from practicing law in Louisiana. However, she did provide an email from the suspended lawyer containing the problematic citations.
In a later filing, Ms. Hamilton acknowledged the inaccuracies, stating that ‘the cited authorities were inaccurate and mistakenly verified using Westlaw Precision, an AI-assisted research tool, rather than Westlaw’s standalone legal database.’ She further admitted her understanding that ‘Westlaw Precision incorporates AI-assisted research, which can generate fictitious legal authority if not independently verified.’
Also Read:
- Dentons Advances Legal AI with Internally Developed Tools for Enhanced Professional Productivity
- EU Parliament Study Urges Major Copyright Reforms for Generative AI Training
During an oral argument on July 24, 2025, Judge Morgan questioned Ms. Hamilton under oath regarding her use of AI-assisted research. Ms. Hamilton stated she ‘assumed’ Westlaw was the source of the fabricated citations because she conducts all her research on that platform. The sanctions were imposed due to her ‘citing to fabricated, AI-generated cases without verifying the accuracy, or even the existence, of the cases’ and ‘misrepresenting to the Court the origin of the AI-generated cases.’ This incident underscores the growing challenges and ethical responsibilities faced by legal professionals in integrating artificial intelligence into their practice.
