The suspected UnitedHealthcare CEO killer seemed to vanish from the view of family and friends six months ago, following a back injury and later surgery.

Authorities detained Mangione on Monday at a McDonald’s in Altoona carrying fake IDs, a manifesto railing against health care companies, and a gun similar to that used in the shooting, they said.

Luigi Nicholas Mangione was apparently living a charmed one: the grandson of a wealthy real estate developer, valedictorian of his elite Baltimore prep school and with degrees from one of the nation’s top private universities.