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.”