In a city that knows its way around glitz and illusion, a Las Vegas defense attorney is being accused of letting artificial intelligence do the talking in a high-stakes criminal case.
Prosecutors say a 70-page reply brief filed in a pretrial habeas petition for bombing suspect Robert Schwieger appears to have been generated by AI. The Clark County District Attorney's Office has asked a judge to toss the filing and consider sanctions. The disputed document is tied to charges stemming from an explosion outside Piero's Italian Cuisine.
Prosecutors say brief leans on a phantom case
In a motion filed Friday, the DA's office urged the court to strike the reply in full and to impose sanctions, arguing that the document leans on nonexistent legal authority and contains other red flags.
According to News 3, the state points to repeated citations to a supposed Nevada Supreme Court decision listed as Evans v. State, 123 Nev. 117, 159 P.3d 438 (2007). Prosecutors say that case cannot be found in Westlaw or even on Google.
The motion also argues that the reply brief looks and sounds nothing like the original petition. The writing style, formatting and citation approach are described as markedly different, and prosecutors say the reply even cites a grand-jury transcript instead of tracking earlier court filings.
Defense client tied to Piero's explosion case
Attorney Dean Kajioka is representing 52-year-old Robert Schwieger in the underlying criminal matter, according to the filings. Schwieger faces indictments that include conspiracy to commit first-degree arson, first-degree arson and use of an explosive to damage or destroy property after a November 2025 explosion outside Piero's Italian Cuisine.
Earlier coverage of the investigation highlighted Schwieger's April arrest and the ensuing grand jury indictments, as reported in second arrest in Piero's and by Casino.org.
AI tripwires keep catching lawyers nationwide
Legal watchers say the Las Vegas dispute fits into a growing national pattern: AI-assisted briefs that show up in court with fake cases, flawed citations or what judges bluntly call "hallucinated" authorities.
Appeals courts and trial judges have repeatedly warned that lawyers cannot outsource their duty to verify citations, even when using generative tools. Some courts have already responded to AI-related errors by striking filings or imposing sanctions when attorneys could not substantiate the authorities they cited.
Bloomberg Law and Law360 have both reported on recent appellate and trial court orders that call out suspected AI errors, including inquiries and sanctions tied to unreliable citations.
What happens next in Las Vegas
The judge in Schwieger's case has not yet ruled on the state's motion. Prosecutors are asking the court to strike the reply brief "in its entirety" and to impose sanctions they say are needed to deter similar conduct in future cases.
As reported by News 3, the state contends that the filing contains multiple fabricated citations and that it was not adequately reviewed before being submitted to the court. The local docket did not immediately list a hearing date on the motion or any formal written response from the defense.
Legal stakes for AI-assisted lawyering
If the court ultimately finds that the brief relied on AI-generated or fabricated authority, judges have a range of tools at their disposal. They can strike documents, award fees or, in more serious situations, refer matters for potential professional discipline.
A federal judge in Nevada recently struck a filing and sanctioned counsel after finding AI-related mistakes in a court document, underscoring how quickly professional fallout can follow these kinds of errors, according to Mealey's.
The controversy in Schwieger's case is likely to intensify scrutiny of how defense teams and other lawyers use generative tools, even for routine drafting. It also serves as a pointed reminder of a longstanding rule of the profession: no matter how advanced the technology, attorneys remain responsible for making sure the law they cite to a court is real and accurate.
For now, the allegation heads to a judge for resolution. Whatever the ruling, it could reshape pretrial briefing, scheduling and the defense strategy as the Piero's explosion case moves forward.
