Luigi Mangione apparently used a ghost gun, a firearm that can be made at home, to shoot down the UnitedHealthcare CEO Brian ...

SAN DIEGO — A 19-year-old was arrested by San Diego County Sheriff's deputies on Wednesday after a ghost gun was discovered ...

Police say the evidence against Luigi Mangione includes fingerprints and notebook entries linking him to the shooting death ...

Gun rights activist Rob Pincus was worried when he heard a 3D-printed "ghost gun" was found on the alleged shooter in last ...

Investigators say Luigi Mangione knew for months beforehand about the investors meeting that brought United Healthcare CEO ...

Part of the gun that the police believe was used to kill the C.E.O. of UnitedHealthcare was made by a 3D printer using a popular design found online.

The suspect in the shooting of UnitedHealthcare CEO Brian Thompson is fighting extradition from Pennsylvania, but sources tell ABC News that prosecutors at the Manhattan DA's office have started ...

The firearm found on the suspect in the murder of the UnitedHealthcare CEO is believed to have been an untraceable ghost gun, ...

A Yorkville man has been charged with felony weapon offenses following a search warrant executed at the beginning of the ...

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

The ghost gun allegedly in Luigi Mangione's possession when he was arrested has been matched to three shell casings recovered ...