DETECTIVES have renewed appeals for potentially crucial witnesses to come forward and help them solve the murder of Jim Attfield.
Ten weeks after the horrific attack police have released a new picture of Mr Attfield the day before he was killed and released a CCTV picture of a man they want to speak to so he can be eliminated from the enquiries.
Jim Attfield was found seriously injured with 102 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, never to be seen until he was found the following morning.
The man shown has yet to come forward despite his picture shown on television, online and in print.
Det Chief Insp Simon Werrett, said: "We want this individual or those who know and love him to contact us so that we can speak to him, ascertain what he was doing in the park and then hopefully dismiss him from the enquiry.
"We want to move on and concentrate fully on potential suspects.”
Seven people, whose images were released last month, are still to come forward.
A Crimestoppers reward of up to £5,000 remains on offer for information which leads to the arrest and conviction of the person or people responsible for the murder.
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 after having been arrested in connection with the murder.