In an answer to another question, there is a reference to this 2012 Natural News article, which in turn cites this NRA-ILA article, which cites "The Chronicle, Muskegon, MI, 8/23/95":
Plans to slay everyone in the Muskegon, Michigan, store and steal enough cash and jewelry to feed their "gnawing hunger for crack cocaine" fell apart for a band of would-be killers after one of their victims fought back. Store owner Clare Cooper was returning behind the counter after showing three of the four conspirators some jewelry, when one of the group pulled out a gun and shot him four times in the back. Stumbling for the safety of his bullet-proof glass-encased counter, Cooper managed to grab his shotgun and fire as the suspects fled. They were all later apprehended and the three present during the shooting face life imprisonment.
This incident is being used to defend the argument that guns are used defensively to avoid shootings.
The article sounds slightly fishy, in that the date of the attack isn't provided, the names of the attackers aren't provided, and the fate of the shopkeeper isn't clear. These are the sorts of details news articles would normally include.
Did this event happen?