Luigi Nicholas Mangione, the whiz kid Ivy League-educated high school valedictorian accused of the execution-style murder of the CEO of one of the nation's largest healthcare providers, may have spiraled out of control after traumatic back surgery. The procedure, which allegedly left Mangione in significant physical and emotional distress, may have contributed to his deteriorating mental state, a factor authorities are considering as part of their investigation. New York prosecutors have formally accused 26-year-old Mangione, a native of Towson, Maryland, of the fatal shooting of United Healthcare executive Brian Thompson. The incident occurred outside the New York Hilton in midtown...