Police have arrested a 38-year-old man from Colchester in connection with the investigation into the murder of James Attfield.
Mr Attfield was struck down in Castle Park on Saturday morning - he had suffered more than 100 knife wounds.
A man was arrested in Cowdray Avenue this afternoon and has been taken to a police station for questioning.
"I'd urge members of the public to continue to call my team with any information they might have about the whereabouts of James Attfield or anything they may have seen or heard in the Castle Park area during the early hours of Saturday morning, Senior Investigating Officer DCI Simon Werrett said.
"This is very much a fast moving and on-going investigation which really needs information from the public.”
Detectives investigating the murder of James Attfield are putting up new posters in pubs to try and identify six mystery men.
An appeal for information on the murder of James Attfield in Colchester will feature on the BBC Crimewatch programme tonight.
Detectives investigating the murder of James Attfield are renewing their appeal for a man and woman to come forward.