Tyrone Walker v. Juliane Pierre

How did the court address the AI-related conduct?

In a summary decision under Appeals Court Rule 23.0, the panel (Meade, Shin, and Tan, JJ.) affirmed the judgment for Pierre, holding that the judge did not err in imposing a constructive trust and that Walker's statute-of-limitations and use-and-occupancy arguments were waived. It also affirmed the orders denying Walker's post-judgment motions. On the citations, the panel added that "the arguments raised would not have changed the outcome of the appeal in any event." The striking itself was the earlier order of May 5, 2025, as entered on the court's docket: the panel struck the Rule 16(l) letter, for reasons the order does not state, and declined to consider the first paragraph of page 34, section II.B (pages 47-49), and section II.C (pages 49-52) to the extent it argued that the defendant's defense was barred by laches. Neither the docket order nor the decision labels this a sanction, imposes a monetary penalty, or refers counsel to any disciplinary authority. The decision is unpublished and, by its own notice, may be cited for persuasive value but not as binding precedent.

Why does Tyrone Walker v. Juliane Pierre matter for law firms using AI?

The panel acted before it heard the appeal. On April 28, 2025, it ordered counsel for the appellant to produce hard copies of “the cases cited in the Appellee’s brief at pp. 23-24” to the Clerk’s Office and to opposing counsel within a week. Counsel filed a response on May 1. On May 5, “after considering the plaintiff’s response,” the panel struck Walker’s letter under Mass. R. A. P. 16(l), ruled that it would not consider three identified portions of his brief, and directed that counsel “is not to argue these issues at oral argument.” The docket order itself does not say why. The panel’s later decision describes the struck portions in footnote 3: “In a prior order, we struck portions of Walker’s brief that included citations to nonexistent cases.”

The decision is otherwise a merits affirmance. The panel found no clear error in the Housing Court judge’s finding of a fiduciary relationship and no abuse of discretion in her imposing a constructive trust over a house Walker had bought for Pierre and their children, and that Walker’s limitations and use-and-occupancy arguments were waived for failure to raise them below or to support them with authority. On the struck material, the panel observed that “the arguments raised would not have changed the outcome of the appeal in any event.” Nothing in the decision or the docket orders attributes the nonexistent citations to artificial intelligence; the Charlotin tracker’s “Implied” AI coding is an inference.

The court did not call its order a sanction. It did not impose a fine, fees, or a referral, and did not name counsel in its decision. What it did was order counsel to produce hard copies of cited cases, and then remove the affected arguments from the appeal. Firms documenting compliance may wish to consider that, in this case, a citation problem addressed before oral argument led the court to narrow what counsel could argue, and that the court struck a Rule 16(l) letter in the same order.