Knife-wielding man approaches concealed carrier in Chicago alley. The guy with the gun quickly ends the threat.

Once again, someone wielding a knife in a sketchy way likely didn't watch "The Untouchables" — or at least, didn't heed the warning from the Chicago cop played by the late Sean Connery about bringing knives to gunfights.

And this latest incident actually took place in the Windy City.

What happened?
Chicago police were called to the 1500 block of West Juneway Terrace around 10:43 p.m. Tuesday to handle a domestic incident — and one of the calls came from a concealed carrier who told police he heard a loud argument coming from his neighbor’s residence, police told CWB Chicago.

The police report said the CCW license holder went to his neighbor’s home where a woman was being confronted by her 19-year-old son, who appeared to be in the midst of a mental episode while holding a knife, the outlet added.