Essex Police have today renewed their appeal for help to track down the killer of a man who was stabbed to death in a Colchester park.
A 38-year-old who was arrested in connection with the killing of 33-year-old James Attfield has been released without charge.
Watch Kate Prout's report.
A 38-year-old man who was arrested by police in connection with the killing of a vulnerable father-of-five in Colchester has been released without charge.
James Attfield, 33, was found stabbed to death in Lower Castle Park last weekend. He had more than 100 knife wounds.
DCI Simon Werrett, of Essex Police, said: "This is very much an active investigation and we still need information to find the person or people responsible for James’ murder.
"James was a vulnerable man who would actively avoid confrontation and risky situations. I cannot see any reason why someone would want to attack him.
"A mother has been robbed of her son, his siblings of their brother and his children of their father.
"I am determined to ensure that James’ family are able to see justice done and whoever is responsible for James’ violent murder is taken off the streets.”
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.”
Police in Colchester have widened their hunt for the weapon used in a frenzied attack on a vulnerable man.
James Attfield, 33, from East Bay in Colchester, was struck down in Lower Castle Park early on Saturday morning - he suffered 102 knife wounds before he died.
Detectives are still struggling to find a motive for the attack.
Click below to watch a report from ITV News Anglia's Victoria Lampard.
Tributes have been paid to James Attfield, 33, who died in Colchester’s Castle Park in the early hours of Saturday morning.
Police are treating his death as murder and detectives from the Kent and Essex Serious Crime Directorate are expected to release more details on Monday.
His mother, Julie Finch, released a statement via Essex Police:
"James was known as Jim to his family and was always shy and polite. Over the years people commented on how good his manners were.
"Four years ago Jim was involved in a car accident which left him with a brain injury and caused the left side of his body to be weak. The injury affected his reasoning and speech.
"Jim was never the type of person to look for a fight and would always back down or walk away."