New York — The man accused of fatally shooting the CEO of UnitedHealthcare pleaded not guilty on Monday to murder and terror charges in a state case that will run parallel to his federal prosecution. Luigi Mangione, 26, was shackled and seated in a Manhattan court when he leaned over to a microphone to enter his plea. The Manhattan district attorney formally charged him last week with multiple counts of murder, including murder as an act of terrorism. His initial appearance in New York’s state’s trial court was preempted by federal prosecutors bringing their own charges over the shooting. The