Luigi Mangione's supporters rally at NYC court as he pleads not guilty to CEO's murder: "He's a political prisoner"

Luigi Mangione pleaded not guilty Friday to federal murder and stalking charges as a mix of supporters, onlookers and others gathered at the federal courthouse in New York City. 

A line — which began forming around 5 p.m. the previous evening — stretched in front of the entrance, with people eager to see the 26-year-old charged with ambushing UnitedHealthcare CEO Brian Thompson, a husband and father of two, outside a midtown hotel on Dec. 4, 2024. 

Investigators said Thompson was on his way to an investors' conference when he was shot in the back on the sidewalk.