Just after 1am on Thursday September 29, a taxi parked in Kingswell Street was approached by two women and a man. The man punched the near-side wing mirror, causing it to smash and the plastic to break away.
Still CCTV images have been released of a man that officers would like to speak with in relation to this incident.
Anyone who witnessed this incident or has any information is asked to contact Northamptonshire police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111.