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An assistant US attorney faces potential sanctions after filing a court brief containing fabricated legal citations and quotations, suspected to have been generated by an AI tool.
In Fivehouse v. U.S. Department of Defense, Assistant U.S. Attorney Rudy Renfer filed a response brief that the court reportedly said contained fabricated quotations and misstatements of case holdings. Renfer reportedly admitted he had used AI to help draft the inaccurate filing after losing an earlier draft. The court reportedly also identified similar fabricated quotations in other filings signed by Renfer.
Domain classification, causal taxonomy, severity scores, and national security assessments were LLM-classified and may contain errors.
AI systems that inadvertently generate or spread incorrect or deceptive information, which can lead to inaccurate beliefs in users and undermine their autonomy. Humans that make decisions based on false beliefs can experience physical, emotional or material harms
Also classified as
The attorney over-relied on the AI tool without verifying the citations, leading to court sanctions.
The AI system generated fabricated legal citations and quotations in a court brief, leading to false representations being submitted to a federal court.
AI system
Due to a decision or action made by an AI system
Unintentional
Due to an unexpected outcome from pursuing a goal
Post-deployment
Occurring after the AI model has been trained and deployed
The generation of fabricated legal citations is an unintentional failure of a deployed AI writing assistant tool.
Added categories peak at 2: Minor (Epistemic Harm, Direct)
An assistant US attorney filed a federal court brief containing fabricated citations likely generated by an AI tool. While this represents a minor disruption to judicial operations and highlights risks of AI overreliance within government functions, it does not pose a significant threat to national security.
The suspected AI tool was used to help draft legal briefs, which is a classic assistant behavior where the AI augments human capabilities but requires human validation.
Limited Risk: The suspected system is a text generator producing AI-generated content, which falls under Limited Risk (Level 3) due to transparency obligations regarding AI-generated text.
The AI system was reportedly used to assist in drafting legal briefs, which is a writing assistant function involving technical text generation.
While the reports detail the fabricated citations and the court's response, the use of an AI tool is inferred based on the nature of the fabrications (hallucinations) and the context of similar legal AI incidents. The US Attorney's office did not confirm or deny the use of AI.
The attorney could have manually fabricated the quotes or copied them from another human source, as suggested by the plaintiff's statement about the 'provenance of the fabricated language'.
Confirmation of whether an AI tool was used, and the specific name of the AI model or platform.
Technology
Suspected AI Tool Usage
Unverified use of AI tools may have generated fabricated legal citations.
Data Inputs
Unverified External Sources
Incorporating text from unchecked external sources or unfinalized drafts.
Human Factors
Inadvertent Draft Filing
Attorney signed and filed an unfinalized draft containing errors.
Inadequate Verification
Attorney failed to verify quotes and holdings before submitting to court.
Process and Methods
Insufficient Review Process
The office lacked a robust process to peer-review filings before submission.
Management
Lack of Office Oversight
Leadership failed to monitor and ensure quality control of attorney filings.
