Authorities have detained Luigi Mangione, a 26-year-old from Towson, Maryland, as a person of interest in the fatal shooting of UnitedHealthcare CEO Brian Thompson. Mangione was arrested at a McDonald’s in Altoona, Pennsylvania, following a rigorous search by police.Thompson was assassinated outside a hotel in Midtown Manhattan last Wednesday. The shooter, described by police as calculated, used a suppressor-equipped firearm, striking Thompson multiple times before fleeing. New York police revealed surveillance images showing a suspect near the crime scene. Thompson’s family reported prior threats made against him. According to law enforcement sources reviewing his online activity, Mangione is known for...