Accused CEO killer Luigi Mangione comes from a wealthy well-known local family in Towson, Md. — and has a cousin who is a state lawmaker. Mangione — a privileged onetime prep-school valedictorian, and tech-whiz University of Pennsylvania grad — allegedly killed UnitedHealthcare CEO Brian Thompson because he was furious over the profit-driven healthcare industry in the US. Thompson, a 50-year-old married dad of two, was executed on a Midtown street last week as he was about to enter a hotel for a conference.