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Police want to talk to man over Derby bar attack
The incident is alleged to have happened at around 12.40am on Saturday, November 26 in the beer garden outside Vines Wine Bar on Sadler Gate.
A 22-year-old man was punched in the face by another man and suffered a broken jaw.
He was taken by ambulance to Royal Derby Hospital where he received treatment for his injuries.
The man in the CCTV was in the area at the time of the assault and officers think he may have information that would help their investigation.
Detective Constable Dan Burns said:
'Although we made an appeal for witnesses soon after the assault happened this man has not come forward. He could be local or may be from the Chesterfield area. It is important that we trace him and get the chance to talk to him about what happened that night.'