Fifty-three-year-old Cornell Mack was charged Thursday with attempted murder and armed robbery. Police are searching for the second suspect.
A videotape shows Luis Quizhpe (KEESH'-pay) on Tuesday clobbering one of the robbers, who was holding a gun to the owner's brother-in-law.
The gunman fired multiple shots at the owner of the store, hitting him in the leg. But the wound didn't stop Quizhpe's vigorous counterassault. Quizhpe's brother-in-law is also seen fighting off a robber.
Mack is hospitalized with a gunshot to the chest. Cook County Assistant State's Attorney Erin Antonietti says Mack was shot by his accomplice.