The brazen killing of UnitedHealthcare’s CEO was likely carried out with a ghost gun, one of the nearly untraceable weapons that can be made a home, police said Monday.
A ghost gun is a firearm without a serial number, and police believe the one used in last week's shooting of Brian Thompson may have been made with a 3D printer. It was capable of firing 9 mm rounds. The man arrested in the crime, Luigi Mangione, also had sound suppressor, or silencer, police said.
