Detectives have begun a forensic review into the death of a woman 40 years ago.
Sandra Phillips was killed while working in a sex shop in Dillwyn Street, Swansea, on 14 June in 1985.
An extensive reinvestigation of the murder got under way in 2004, but all lines of enquiry were exhausted.
South Wales Police said a number of forensic exhibits had been submitted for forensic testing.
Det Ch Insp Claire Lamerton, head of the South Wales Police review unit, said: “South Wales Police has had considerable success with cold cases, being one of the first forces in the country to set up a review team in 1999 to conduct cold case reviews.
“We hope that the outcome of the forensic review will give us the opportunity to bring justice for Sandra’s family who we have informed of this new work.
“Even though four decades have passed, I appeal to anyone who has any information about Sandra’s death to come forward.”
