Luigi Mangione faces state and federal murder charges for the December 2024 killing of UnitedHealthcare CEO Brian Thompson outside a Manhattan hotel.Mangione was arrested in Altoona, Pennsylvania, in December 2024, after providing a fake name; authorities found a handgun, a silencer, a 3D-printed pistol, and a notebook described as a "manifesto" during the arrest.Prosecutors are seeking the death penalty, and a suppression hearing focused on the legality of the search after defense attorneys argued key evidence should be excluded due to an alleged warrantless search and questioning without rights notification.