United States v. Hayes
E.D. California · Jan 17, 2025
- Jurisdiction
- federal
- Court
- E.D. California
- Record ID
- united-states-v-hayes-2025-01-17
- Observed outcome
- Formal Sanction Imposed + Written Reprimand
- Known monetary consequence
- Not recorded
Why this matter warrants attention
Outcome: Formal Sanction Imposed + Written Reprimand. AI UseDefense counsel Andrew Francisco submitted filings quoting and relying on a fabricated case (United States v. Harris, 761 F. Supp. 409 (D.D.C. 1991)) and a nonexistent quotation. Although Francisco claimed he had not used AI, the court found the fabrication bore the hallmarks of an AI hallucination and rejected his explanations as implausible.Hallucination DetailsFrancisco cited and quoted from a wholly fictitious United States v. Harris case, which neither existed at the cited location nor contained the quoted material. Upon confrontation, Francisco incorrectly tried to shift the source to United States v.…
The court emphasized that submitting fake legal authorities undermines judicial credibility, wastes opposing parties' resources, and abuses the adversarial system. Persistent refusal to candidly admit errors aggravated the misconduct. The Court explicitly cited Mata v. Avianca and other AI hallucination cases as precedent for sanctioning such behavior, finding Francisco’s case especially egregious due to repeated bad faith evasions after being given opportunities to correct the record
Denying AI use under questioning converts a citation error into professional sanction and future discipline exposure.
Failure modes and consequences
- Trial
- None Adjudicated
- AI attribution
- Not Established
- Recorded tool
- Unidentified
- Known monetary consequence
- Not recorded
- Procedural posture
- Formal Sanction Imposed + Written Reprimand
reason.com
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What this record does—and does not—establish
The current record does not establish a specific AI tool. Do not infer AI use beyond the source.
The record summarizes the outcome described in the linked public source. The recorded link is a secondary or other public source and should be checked against the docket where available. This page is not a substitute for the complete docket, subsequent history, or jurisdiction-specific advice.
Latest evidence review: Secondary Source Only (medium confidence).
Controls suggested by the public record
- Read the linked source and subsequent docket history before relying on this record for legal work.