Police came along and arrested the man, Lorenzo Gaspar, on Friday, but now they're saying 'sorry.'
The Shelbyville Times-Gazette reported police thought the bill was counterfeit after a store clerk called them, saying a marker used to detect phony money didn't show the bill was real.
But a police evidence technician told the arresting officer that some old bills don't react to the markers. So police gave the half-a-c-note to two banks to check, and they determined it was real, alright - just very old.
Mr. Gaspar was released from jail and he received an apology from the police - although apparently no cash reward for his inconvenience at the convenience store.