Officers are yet to identify a suspect in a violent robbery at a shop in Leeds last year.
The man, who secreted packets of steak and jars of coffee in his jacket, sprayed two members of staff with a canister of pepper spray when he was challenged outside by the owner and the staff.
The incident occurred on 21 August last year at the Londis convenience store, in Woodhouse Street, Woodhouse.
West Yorkshire Police said they had been pursuing specific lines of enquiry in relation to the incident, but those enquiries have now concluded without identifying the suspect.
They have now issued a public appeal to identify the suspect.
Anyone who recognises the man in the image is asked to contact PC 6671 Cavalier via 101 quoting crime reference 13200421660 or online.
Information can be given anonymously to the independent charity Crimestoppers on 0800 555 111.
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