Police have stepped up their inquiries to find three men in connection with the gangland killing of a man in 2003.
Police hunting three men released the picture on Thursday
Seven people have already been convicted over the death of Daniel Higgins, who was tortured and shot at a house in Burnham, Slough, Berkshire.
The "execution" in November 2003 was allegedly a revenge attack for the murder of Mohammed Mahmood that year.
On Thursday police released a CCTV image of one of the suspects they are hunting in the inquiry.
Detectives are still trying to trace Jamil Khalid, 26, Kashif Mahmood, 24, and 26-year-old Arfan Yaqoob.