James Attfield death murder probe: Hunt for three men
Three men who may have seen a vulnerable 33-year-old who was stabbed 102 times in an Essex park are being sought by murder detectives.
James Attfield, who had a severe brain injury after being hit by a car four years ago, was found in Castle Park, Colchester, on 29 March.
The men were in the area of the park that day or late on 28 March.
Earlier, police divers carried out a search of the River Colne, which runs through the park, for clues.
Mr Attfield was at the River Lodge pub in Colchester on the night of 28 March but police do not know where he went before he was found early the next day.
They want to speak to a dark-haired man in his early 30s, who had stubble and was wearing jeans and a red checked shirt. He was seen in the area of Ryegate Road at about 23:00 GMT on 28 March.
A large, bald man, described as being about 6ft, was seen in the Pillbox Walk area at about 06:05 on 29 March.
He is believed to be about 40 to 45 years old and was wearing a knee-length grey coat in poor condition and black jeans. He was carrying a blue plastic bag in one hand, and a can of beer in the other.
Police are also keen to trace a man seen on a pathway between Northgate Street and Lincoln Way, by the Roman wall, at about 22:25 on Friday.
He was aged in his late 40s, with short hair, possibly balding, and was about 6ft 2in. He was wearing a beige knee-length coat and had the collar of the coat up around his mouth.
On Saturday, a 38-year-old man arrested in connection with the investigation was released without charge.