Luigi Mangione pleaded not guilty to murder and weapons charges in the death of UnitedHealthcare CEO Brian Thompson during his arraignment on Monday morning. The federal charges could carry the possibility of the death penalty, while the maximum sentence for the state charges is life in prison without parole. Prosecutors have said the state and federal cases will proceed on parallel tracks, with the state charges expected to go to trial first. One of Mangione’s attorneys told the judge that gove