DETECTIVES have released another picture of Jim Attfield in the hope of jogging people's memories.
In the latest picture Mr Attfield is seen at the counter of the Post Office in Head Street.
Officers have also re-released a CCTV image of a man seen in Lower Castle Park at 10.56pm on March 28, as they want to speak to him to eliminate him from their enquiries.
Essex Police have now confirmed that although the time on the picture says 11.56pm the clock was one hour fast.
James Attfield was found seriously injured with over 100 stab wounds in Castle Park off Guildford Road shortly before 6am on Saturday, March 29. He died a short time later at the scene. The 33-year-old man from East Bay in the town was last seen in the River Lodge Public House on Middleborough on Friday, March 28. He left there shortly after 10pm and police are continuing to piece together his last movements from witness accounts.
A Crimestoppers reward of up to £5,000 still remains on offer for information which leads to the arrest and conviction of the person or people responsible for the murder.
The man shown in the night-time CCTV image or anyone with information is asked to call Essex Police on 101 or Crimestoppers anonymously on 0800 555111.
A man and a woman, both aged 27 and from Colchester, are currently on police bail until Wednesday, July 9 after having been arrested in connection with the murder.