Mangione’s arraignment for the killing last December attracted several dozen people to the federal courthouse in Manhattan.

Luigi Mangione pleaded not guilty to federal murder charges in the death of UnitedHealthcare CEO Brian Thompson. Prosecutors ...

Luigi Mangione pleaded not guilty to federal charges including murder and stalking Friday at his arraignment in the killing ...

Luigi Mangione, the Maryland man accused of hunting down and killing a UnitedHealthcare CEO over what prosecutors said was ...

Mangione, an Ivy League graduate from a prominent Maryland real estate family, faces separate federal and state murder ...

Luigi Mangione pleaded not guilty Friday to the murder of UnitedHealthcare CEO Brian Thompson in his federal death penalty ...

Luigi Mangione pleaded not guilty Friday to the murder of UnitedHealthcare CEO Brian Thompson in his federal death penalty case — as a judge warned government prosecutors ...