Officers were called to the business on Tower Street South on Thursday.
Investigators say the alleged theft happened a week earlier on July 29th.
A man was seen putting several items in a backpack and walking out of the store without paying.
A photo of the person of interest (seen below), released by the OPP, shows a man wearing a graphic t-shirt with what appears to be a red bird on the front.
He was also wearing dark pants, boots, and a black baseball-style cap.
Anyone with information about this person of interest is asked to contact Wellington County OPP or Crime Stoppers.