Fifth Circuit reassigns case after AI-generated judicial errors

On October 22, 2026, the Fifth Circuit vacated an injunction and reassigned a Mississippi case after the district judge acknowledged that a law clerk’s unvetted use of Perplexity contributed to fabricated authorities and factual errors. The appellate court concluded that the scale of the mistakes cast doubt on the integrity of the lower-court analysis, while noting that US courts still lack uniform AI-use rules. For litigation teams, judicial AI use is now a record-integrity and appellate-risk issue as well as a lawyer-ethics issue. Counsel should preserve clean source records, challenge unexplained factual or doctrinal anomalies promptly and avoid assuming that court-generated text has passed a reliable verification process.