Pit bull stops armed robbery after victim’s friends turn dog loose on suspect

CHICAGO — A pit bull went after and helped capture a suspected armed robber in Chicago last week, authorities say.
Prosecutors said Marshon Hannah, 18, pulled a gun on a man in a gated property on the 4900 block of South Marshfield Avenue in the Back of the Yards neighborhood last Friday.
According to the Chicago Tribune, Hannah displayed a .38-caliber Colt revolver and made the victim turn over his belongings and a set of keys.
Friends of the homeowner said they saw what happene