Nevada Court Limits AI Disclosure Rules for Experts
A federal court ruled that experts need not disclose their ChatGPT prompts or drafting materials in legal cases.
Updated on Oct. 16, 2026 in Artificial Intelligence
Live Poll
Do you believe experts should be required to disclose all AI tools used to form opinions?
On September 29, 2026, a federal court in Nevada ruled that testifying experts must disclose AI-generated summaries but can shield their ChatGPT prompts and drafting materials. This decision overturned a prior order that had demanded the production of an expert's entire 40-page log.
Why it matters
The court determined that protected work product and trial preparation materials remain privileged even when generated using AI tools. By distinguishing between discoverable facts and protected mental impressions, the ruling provides a framework for how AI history should be treated in legal discovery.
The ruling specifically protects prompts, deposition preparation materials, and draft report content in case 2:24-cv-00125-ART-DJA. The court contrasted this with a prior disclosure order in case 3:21-cv-00933, which concerned AI prompts used to cull documents.
The players
Tom Melton
He is an expert witness who disclosed his use of ChatGPT for research and report drafting during his deposition.
Las Vegas Metropolitan Police Department
This is the law enforcement agency named as the defendant in the legal case Villanueva v. Las Vegas Metropolitan Police Department.
The details
In the case Villanueva v. Las Vegas Metropolitan Police Department, the court applied Rule 26 to evaluate the ChatGPT history based on its substance rather than the technology used. Expert witness Tom Melton had disclosed his use of ChatGPT during his deposition, prompting the dispute over which portions of his digital interactions were discoverable.
Timeline
May 18, 2026: A court ordered the disclosure of AI prompts in the Shell Oil case.
September 29, 2026: The federal court issued the ruling in the Villanueva case.
October 16, 2026: Publication date of the article.
The Tech Race
This decision represents a pivotal moment in how courts adapt procedural rules to the rise of generative AI. It clarifies that long-standing legal protections for trial preparation materials will continue to limit discovery requests that seek wholesale production of AI model logs.
This ruling establishes a standard that prioritizes attorney-client privilege over complete transparency in AI-assisted legal filings. For users and professionals, it suggests that using AI for draft work does not automatically forfeit protections that traditionally safeguard internal intellectual processes.
The takeaway
Legal experts are finding that the integration of generative AI into professional workflows does not bypass existing discovery protections. Professionals should continue to treat their AI prompts and drafting histories as sensitive work product until further appellate guidance emerges.
Further reading
For more on evolving legal standards, see the Artificial Intelligence section.
Source note: This article includes information reported by The National Law Review - A Free To Use Nationwide Database of Legal Publications.
Live Poll
Do you believe experts should be required to disclose all AI tools used to form opinions?
