Detectives investigating the death of Terry Leeks are still looking to identify one person captured on CCTV near the time he was attacked.
Mr Leeks, who would have turned 47 last week, was stabbed in Northlands Park, Basildon, at around 1.30am on July 11.
He died later in hospital.
Earlier this month CCTV footage was released of a group of four people police want to identify who may have information about what happened .
They now believe we have identified three of the people in the footage but are continuing to appeal for information about the fourth person.
You can see the CCTV footage here: https://youtu.be/JvXZv1Vxfzw
Officers are also trying to identify everyone who was in the park at the time of the incident.
Detective Chief Inspector Louise Metcalfe, who is leading the investigation, said: “We know there were a number of people fishing at the lake overnight as well as other people in the park.
“We have spoken to some people but not everyone and I need anyone who was in Northlands Park in the early hours of July 11 to contact my team.
“We are making good progress with the investigation but it’s really important we’re able to identify everyone in the area that night and speak to them.
“If you were in the park, or know someone who was, please come forward.”
If you were in the park, have any information about someone who was, or recognise the person in the CCTV footage please call 101 quoting the crime reference number 42/136379/21.
You can also submit information through a special portal: https://mipp.police.uk/operation/4201020121P78-PO1
Or you can report it online at https://www.essex.police.uk or use the ‘Live Chat’ button to speak to an online operator between 7am-11pm.
Alternatively you can contact Crimestoppers and you will remain anonymous.
Crimestoppers won’t ask your name or any personal details, they won’t record your call and your number won’t be displayed.
When information is passed from Crimestoppers to the police, it doesn’t contain any information which could identify you.