In the wake of Luigi Mangione’s alleged killing of a health care CEO with a partially 3D-printed pistol, we built the exact same weapon ourselves—and test-fired it.

A 19-year-old engineering student died in an "intentional" shooting at a house party in Michigan, where alcohol is suspected as a factor, police said.

The latest data from the King County Prosecuting Attorney’s Office (KCPAO) shows something rare these days: a real, ...