They’re 3D-printed or assembled piece by piece. A patchwork of state and federal regulations puts them in a legal gray area.

Ghost guns' can be partially made with a 3D printer, which anyone can buy. It's also a tool found in college classrooms.

Here is what to know about Thomas Dickey, a Pennsylvania attorney who is representing United Healthcare CEO murder suspect ...

Police said Luigi Mangione, the man charged in the killing of UnitedHealthcare CEO Brian Thompson, appears to have had a ...