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Rivera Carrasquillo v. USA

Court
D. Puerto Rico
Jurisdiction
USA
Decided
2025-11-07
AI tool
Implied
Outcome
—
Monetary penalty
None reported

What was hallucinated

Misrepresented: Case Law | Counsel attributed a purported statement to Smith v. Phillips claiming the Court 'insisted' juror-bias inquiry cannot proceed without identifying the juror; the court found no such statement in Smith and called the citation misleading. || False Quotes: Case Law | Counsel included a non-existent quotation attributed to United States v. Paniagua-Ramos in support of limited disclosure of juror numerical identifiers; the court found Paniagua-Ramos does not address that subject and the quote was not present in the cited opinion.

Sanction teardown · D. Puerto Rico, USA · 2025-11-07

Rivera Carrasquillo v. USA

What happened

In D. Puerto Rico, USA, a filing relied on an unnamed/unconfirmed AI tool to help draft legal argument. The court identified the following problems with the citations in that filing:

  • Misrepresented (Case Law)
    Counsel attributed a purported statement to Smith v. Phillips claiming the Court 'insisted' juror-bias inquiry cannot proceed without identifying the juror; the court found no such statement in Smith and called the citation misleading.
  • False Quotes (Case Law)
    Counsel included a non-existent quotation attributed to United States v. Paniagua-Ramos in support of limited disclosure of juror numerical identifiers; the court found Paniagua-Ramos does not address that subject and the quote was not present in the cited opinion.

Which AI tool

an unnamed/unconfirmed AI tool. Note: Charlotin's public database records tool attribution only where a court order, brief, or reporting on the matter states it explicitly; "unidentified" or "implied" means the record indicates AI use but does not name a specific product — we do not guess.

Outcome

Not specified in source record.

How Citation Safe would have caught this

Citation Safe runs three deterministic layers before a brief is filed: (1) does the citation exist against CourtListener's database of published opinions, (2) if quoted, does that exact language appear in the source, (3) does the cited case actually support the proposition it is cited for. Fabricated case citations fail Layer 1. Fabricated or misattributed quotations fail Layer 2 even when the underlying case is real. Misrepresented holdings — a real case cited for a proposition it does not support — are the target of Layer 3. None of these checks involve asking another language model whether the citation looks right; they are lookups and text-matches against the actual source, which is why a hallucinated citation has to survive a direct lookup against the authoritative source — not another model's opinion — to earn a VERIFIED stamp; our measured false-verify rate is published live at /quality.

Check a brief before you file it → · See our live false-verify rate

Source: https://www.damiencharlotin.com/documents/1028/Rivera-Carrasquillo_v._USA_USA_7_November_2025.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

Source: https://www.damiencharlotin.com/documents/1028/Rivera-Carrasquillo_v._USA_USA_7_November_2025.pdf

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