Luigi Mangione, 26, pleads not guilty to murder and terrorism charges in the shooting of UnitedHealthcare CEO Brian Thompson. His attorney criticized NYC officials and Mayor Adams for a publicized perp walk, claiming it jeopardizes his right to a fair trial. Aspects of Mangione's case include life imprisonment at state level and potential death penalty federally. With significant public support and ongoing media attention, concerns grow regarding the impact on jury impartiality. Prosecutors push for simultaneous state and federal trials, reflecting the severe implications of the case.