Alleged CEO shooter Luigi Mangione was able to build his murder weapon thanks to directions he obtained from a "3-D ...

With those, DIY-gunmakers download a design file, and feed it into a machine that prints layers of plastic to make some components of a gun. Someone has to create and refine those design files to ...

Weapons of the type allegedly owned by UnitedHealthcare murder suspect Luigi Mangione are untraceable and can be made using a 3D printer “Gun control is dead,” reads one message on Deterrence ...

For decades, America's detectives have made breakthroughs in crime using gun traces. A homicide investigator typically uses ballistics and serial numbers of weapons checked via a vast network of ...

The man suspected of the fatal shooting of UnitedHealthcare CEO Brian Thompson was carrying a “ghost gun” — a type of untraceable, homemade firearm — when he was apprehended Monday ...