Detectives investigating the murder of a woman in Liverpool five years ago have uncovered new CCTV footage they hope could help find her killer.
The body of Anne Marie Foy, 46, was found dumped in a wooded area off Crown Street, near Royal Liverpool Hospital, on 15 September 2005.
Ms Foy, who worked as a prostitute, had been beaten and strangled.
New pictures from Crown Street show a man whom police believe may have witnessed something.
The footage shows the man was walking from the direction of Brownlow Hill at 0651 GMT on 15 September.
At the same time another figure appears from the direction of the car park, which leads to the undergrowth where Ms Foy's body was found.
The second figure crosses the road and passes the first man, who then turns to look back a number of times before walking out of sight.
The man police want to speak to was wearing dark clothing with a white horizontal stripe across the front. He also appears to be carrying a white parcel.
Merseyside Police believe he could be a vital witness and are urging him to come forward.
Det Supt Ian Kemble, senior investigating officer, said: "This is new footage that we have uncovered and we are keen to speak to this gentleman as we believe he may have seen something which could prove vital to our investigation.
"It is five years since Anne Marie Foy was murdered and her family are struggling to come to terms with her death.
"The man in this CCTV footage could possibly help us with information which could help us to find the offender and give closure to the family."
A 64-year-old man arrested by detectives on Thursday was due to return to a police station for questioning on Friday.