It was the beginning of gun violence involving machine guns in the U.S., a deadly trend quashed by laws only to re-emerge today with Glock switches, devices that turn ordinary handguns into even ...

VALPARAISO -- Sixty-seven years ago, legendary gangster John Dillinger stormed into banks and peppered the ceilings with bullets from a Thompson machine gun belonging to the Porter County police -- ...

The movies did their part in this myth-making. During the burgeoning years of Hollywood, the Tommy Gun became extremely popular on the silver screen, with popular gangster films featuring ...

Two cops rush to the scene. "This sounds like a gun battle — over there!" one calls to his partner. They see the suspects: two little boys, wielding rifles. The police officers do not shoot ...

But a more storied use of the “Tommy gun,” as it was dubbed, was employed by minions of Capone, the nattily dressed king of the Chicago underworld in the 1920s and ’30s.

WATCH: Up close and personal with the bump stock: 'Machine gun' or firearm toy? ABC News Live Prime, Feb. 27, 7 p.m. and 9 p.m. ET, streaming on Hulu or the ABC News app.

On Valentine’s Day 1929, four men connected with Al Capone’s Chicago gang killed seven rivals with Thompson machine guns, better known as Tommy guns. The bloody massacre shocked the nation, making ...

On Valentine’s Day 1929, four men connected with Al Capone’s Chicago gang killed seven rivals with Thompson machine guns, better known as Tommy guns. The bloody massacre shocked the nation ...