New York police now say the 3D-printed gun that CEO killing suspect Luigi Mangione had when he was arrested in Pennsylvania this week matches shell casings at the crime scene. Mangione’s ...

(CNN) — The 3D-printed gun that health care CEO killing suspect Luigi Mangione had when he was arrested this week in Pennsylvania matches three shell casings found at the crime scene in ...

Shell casings police recovered at crime scenes are entered into a machine, which takes 3D microscopic images of the markings a gun leaves. Each gun carries its own unique identifier, like a ...