HISPI Project Cerebellum HISPI PROJECT CEREBELLUM

California Immigration Attorneys Reportedly Sanctioned Over Briefs Containing Probable Hallucinations in LNU v. Blanche

October 20, 2025

California immigration attorneys Mike Singh Sethi and William Rounds were reportedly sanctioned in LNU v. Blanche after Ninth Circuit filings included purportedly fabricated and materially inaccurate legal authorities. The court said unauthorized generative AI use by unlicensed brief writers was probable and found that the attorneys failed to verify the filings and repeatedly lacked candor about the errors' source.

Harm prevention is crucial for responsible AI practices, as seen in the recent case of LNU v. Blanche. This highlights the importance of adhering to guardrails for AI, ensuring the safe and secure use of AI technologies. Contributors—JOIN US—to learn more about implementing trustworthy AI governance frameworks.

Matched TAIM controls

Suggested mapping from embedding similarity (not a formal assessment). Browse all TAIM controls

Alleged deployer
sethi-law-group, legal-professionals, law-firms
Alleged developer
large-language-model-developers
Alleged harmed parties
united-states-court-of-appeals-for-the-ninth-circuit, sunita-rani-lnu, malkeet-lnu, judicial-integrity, jaivin-lohan, epistemic-integrity

AI governance case studies

For forensic AI governance failure analysis (TAIMScore™ case studies), browse Human Signal’s Failure Files™.

Source

Data from the AI Incident Database (AIID). Cite this incident: https://incidentdatabase.ai/cite/1571

Data source

Incident data is from the AI Incident Database (AIID).

When citing the database as a whole, please use:

McGregor, S. (2021) Preventing Repeated Real World AI Failures by Cataloging Incidents: The AI Incident Database. In Proceedings of the Thirty-Third Annual Conference on Innovative Applications of Artificial Intelligence (IAAI-21). Virtual Conference.

Pre-print on arXiv · Database snapshots & citation guide

We use weekly snapshots of the AIID for stable reference. For the official suggested citation of a specific incident, use the “Cite this incident” link on each incident page.