Detectives investigating the death of James Attfield in Colchester say they've been able to eliminate three more people from their inquiries.
33 year old Mr Attfield was stabbed more than a hundred times in an attack four weeks ago today.
Police issued CCTV pictures of people captured walking in the park. They say three more have now come forward. They also want to trace a couple seen on a bench in Castle Park. Two people have been questioned and released on police bail.