Prosecutors will eventually charge her and she will get many years in jail for doing what the police could not.
Granted the article lacks in detail, but I cannot think of one charge the store owner could face. If the store owner has a FID card and the gun was purchased with a valid permit (I bet at the Bullet Hole in Belleville), and the shooting occurred in his place of business, where he legally has the right to possess (the range and home are the other places), and the perp had a gun in his hand as per the article, then the store owner is free and clear. I’m am a NJ gun owner and am very familiar with NJ laws. The store owner followed NJ’s gun laws to the T.