Luigi Mangione, accused of murdering UnitedHealthcare CEO Brian Thompson in a targeted attack, waived extradition from Pennsylvania and has been flown to New York for arraignment. He faces first-degree murder charges related to terrorism, with further federal charges anticipated. Prosecutors allege the killing was intended to instigate fear, while Mangione's defense argues against the charges citing potential double jeopardy. His next court appearance in New York is imminent, and he potentially faces life imprisonment if convicted.