K.W. v. Ringwood Board of Education

What did the court warn about?

In its June 16, 2026 Opinion & Order (D.E. 110) the court granted Plaintiff's summary judgment motion, denied Ringwood's, remanded for a new due process hearing, and denied counsel's motion to withdraw as moot. It noted that on one point Plaintiff "initially relied on two cases that did not appear to exist," recounted counsel's admission that he "appears to have overstated or paraphrased [a] decision's language rather than quoted it directly," and wrote: "The Court cautions counsel to use more care going forward," quoting a District of New Jersey decision that, where briefs contained "AI hallucinated case law," courts "have found it appropriate to impose monetary fines ranging from $1,000 to $6,000." It imposed no sanction and rejected counsel's assertion that Ringwood's filings had similar defects. In an August 25, 2026 fee opinion (D.E. 115) the court disallowed the 23.0 hours counsel billed auditing the deficient citations, halved the hours for the summary judgment brief because it "contained numerous cases and citations that the Court could not identify," allowed 4.0 of 12.5 hours for the opposition brief, reduced the summary judgment briefing fees 25% for limited success, then cut the fees a further 25% under a heading stating that the fee application "Shocks the Conscience," and awarded $28,143.75 of the $93,900 sought. The fee reductions are not labeled sanctions.

Why does K.W. v. Ringwood Board of Education matter for law firms using AI?

The sequence in K.W. is a useful illustration of how a court can proceed when it finds unverifiable authority on its own review. The court found the problem itself: while researching the cross-motions and counsel’s pending motion to withdraw, it noticed quotations, citations and cases in Plaintiff’s briefs that it could not locate, and it paused the merits to issue a Memorandum Order that catalogued the defects and set out four directives: copies of every quoted case with the quotation highlighted, copies of every cited case with the supporting sentences highlighted, an explanation of where counsel found anything he could not produce, and a disclosure of whether and to what extent he used generative AI.

The June 16 decision resolved the cross-motions in Plaintiff’s favor and imposed no sanction. The court recounted that Plaintiff “initially relied on two cases that did not appear to exist,” quoted counsel’s admission that he “appears to have overstated or paraphrased” a decision’s language, and cautioned him “to use more care going forward,” quoting Gardner v. Combs for the range of fines other judges have imposed for AI hallucinated case law. The opinion does not say what counsel disclosed about AI use, and it does not find that AI produced the defects.

The financial consequence arrived in the fee opinion. The court declined to compensate the 23.0 hours counsel billed auditing the deficient citations, reasoning that they were not “useful and of a type ordinarily necessary” to the result, and it reduced the hours for the two briefs that contained the unlocatable authority. Firms documenting compliance may wish to consider that, in fee-shifting practice, unverified citations can reduce a recoverable fee even where the court imposes no sanction.