What bugs me about this article is that the cops knew the place was going to be hit and waited for it to happen. From my own experience I know that most robbers just want the money and to get the heck out of there as fast as they can. Perhaps they were working under this same assumption.
Trouble is, a friend of mine was gut-shot by two punks who had previously been denied a beer sale due to their ages. Two cases of Shlitz Malt Liqour. It was while they were leaving that one of the perps turned, looked at my friend and fired the sawed-off 30cal. rifle. He lived, but has a nasty limp. Seems after dragging himself around the counter to the front (that was the only thing he could think of) he was spotted by another customer who then called for help.