Luigi Mangione's emotional disturbance defense may have huge impact in his other case: lawyer

This material may not be published, broadcast, rewritten, or redistributed. ©2026 FOX News Network, LLC. All rights reserved. Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by Factset. Powered and implemented by FactSet Digital Solutions. Legal Statement. Mutual Fund and ETF data provided by LSEG. Alleged CEO killer Luigi Mangione's defense team plans to use a psychiatric defense, claiming he suffered extreme emotional distress. Judge Gregory Carro demands evidence of the mental state and its trigger before trial. Lawyers for Luigi Mangione, the 28-year-old former Ivy Leaguer accused of assassinating UnitedHealthcare CEO Brian Thompson, indicated he could use an "extreme emotional disturbance" defense, which, if successful, could reduce a murder conviction to first-degree manslaughter if jurors find him guilty after his September trial. Mangione is also facing a federal trial slated for early next year. "It's too early to say exactly how it will affect the federal prosecution, and he could theoretically pursue a different defense strategy there," said Randolph Rice, a Maryland-based attorney and legal analyst who is following the case. "But fr