A person of interest has been identified in the fatal shooting of the UnitedHealthcare CEO, Brian Thompson. Police say they found a “ghost gun” made with a 3D printer on the man, who has been charged in Pennsylvania with weapons, forgery and other crimes. The use of this type of firearm – whether made with a printer or bought online as a kit and assembled at home – has grown increasingly common in the past decade in part because they don’t have serial numbers and can’t be traced by authorities.
Here’s how they have gone from a pastime of gun enthusiasts and tinkerers to an increasing part of US gun violence – and the subject of a major supreme court case.
