Alexa Herrera A New York judge ruled that a gun and notebook that prosecutors say link Luigi Mangione to the murder of UnitedHealthcare CEO Brian Thompson can be used during his state trial. A Monday morning hearing centered around the defense's bid to suppress evidence found in a backpack during Mangione's arrest, including a 3D-printed gun, a silencer and a notebook. Mangione's lawyers say their client was unlawfully searched when he was arrested at a McDonald's in Altoona , Pennsylvania.