Luigi Mangione, 26, has been charged with the murder of United Healthcare CEO Bryan Thompson in New York. Arrested in Pennsylvania, he was found with a ghost gun and documents indicating a motive for the killing. Mangione, from a wealthy Maryland family, was a valedictorian and had degrees from the University of Pennsylvania. His social media suggests a troubling mindset, including admiration for the Unabomber manifesto. Evidence links him to the crime scene, and police found phrases at the scene that hint at a possible motive against healthcare insurers.