A customer came into his store and paid with a fake $100 bill, but it turned out that the bill was actually a legitimate bill made into a counterfeit — and he failed to catch it.

Deputies said they found four more fake $100 bills inside the man's vehicle. The Secret Service is still looking for the man they said used fake $10 bills at area Family Dollar stores.

Costello feels that his mistake in accepting the fake $100 was driven by the fact that he simply didn't take the time to look carefully enough at the bill. "Take the extra couple seconds, actually ...