A 20-year-old man from Basildon was stabbed in the back during a disturbance outside a parade of shops next to the Jolly Friar pub in Whitmore Way, Basildon, on Saturday October 15 2016 at around 12.05am.
He was taken to hospital where he was treated for injuries and later discharged.
Officers have been making enquiries since the incident and are now in a position to release a CCTV image of a man they want to speak to in connection with the incident.
Police also want to speak to two other men in connection with the incident.
One was described as black, between 18 and 22 years old and around 6ft tall.
He was described as being of muscular build and had short black hair shaved at the sides.
He wore a Manchester United shirt, dark coloured jacket, jeans and baseball cap.
The third man was described as black and thought to be around 16 years old, of stocky build and had short hair which was shaved at the sides.
He wore a grey puffer style jacket and jeans.
Witnesses or anyone with information are asked to call Pc Matthew Musson at Basildon CID on 101 or contact Crimestoppers anonymously on 0800 555 111.