Accused killer of US insurance CEO pleads not guilty to 'terrorist' murder

Luigi Mangione wore a white shirt, burgundy sweatshirt and was shackled during his appearance in a Manhattan court where he was flanked by police officers. Monday's hearing came after Mangione, 26, appeared in a New York court last week to face federal charges also including murder following his dramatic extradition by plane and helicopter from Pennsylvania, where he was arrested at a McDonald's restaurant. The suspect is charged in both state and federal court in the December 4 shooting of UnitedHealthcare chief executive Brian Thompson.