Accused in Brian Thompson killing was in court in New York on federal charges – which could carry the death penalty

When Luigi Mangione walked into a Manhattan federal courtroom on Thursday afternoon, he looked like any number of smartly dressed defendants prosecuted here – not someone accused of a brutal murder on the streets of New York that caused headlines around the world and a national manhunt.

Mangione, 26, is accused of shooting UnitedHealthcare chief executive Brian Thompson in a brazen street assassination that also sparked a national outpouring of social media vitriol from many Americans against the healthcare industry.