Police investigating the death of a man from Trowbridge are looking for three people seen on CCTV cameras who could be potential witnesses.
Adrian Cooksey, 50, died on 8 March 2009 after being found with head injuries in Spa Road, Melksham.
A couple were filmed opposite the town's taxi rank at about 0110 BST on the same day. Later, a man was seen running near Spa Road petrol station.
Police said the three may have key information to help their inquiry.
Earlier this year, officers made similar appeals in their search for new clues.
Det Sgt Rob Findlay said: "We have had a good response to our earlier appeals and we need the help of the public to identify these three people.
"I must stress that they are being sought as potential witnesses and we would appreciate their assistance as they may have key information to aid our investigation."
The man seen running is described as being of slim build and was wearing jeans and light-coloured shoes or trainers.
Last year, Thomas Minshull of Melksham, was cleared of manslaughter and Wiltshire Police relaunched the investigation following a review.