A woman has spoken of her hurt that she may never see the person who killed her niece almost 40 years ago brought to justice.

Agnes Byrne, 78, the only surviving relative of Anna Kenny, said she was disappointed she would never see anyone brought to justice over her niece's brutal killing in 1977.

There had been hopes World's End murderer Angus Sinclair could be prosecuted over the Glasgow woman's death but a cold case review has failed to find any new leads.

Detectives recently reviewed all evidence linked to the death of Anna, who was raped and strangled after disappearing following a night out in Glasgow in August 1977.

Angus Sinclair killed Edinburgh teenagers Helen Scott and Christine Eadie after meeting them at the World's End pub on the Royal Mile just two months later.

Sinclair, who was jailed for the attacks in 2014, has long been suspected of being responsible for several other murders of young women, including brewery worker Ms Kenny.

It emerged on Wednesday that detectives failed to find any DNA evidence linking Sinclair to her murder while checking physical evidence against a database of criminals' DNA.

A Crown Office spokesman said: "Our cold case unit regularly reviews cases to ascertain if there are any new evidential developments, including advances in forensic techniques, which would assist in providing a basis for criminal proceedings.

"Recent re-examination of the physical evidence in the Anna Kenny case did not establish any new lines of enquiry.

"However, the investigation into her murder remains open and under review and we will consider any new evidence that comes to light."