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The scene

ON a small laneway known as 'The Cut', nestled off Dublin's Glenageary Road and just yards from her home, Sarah Murray made a grim discovery.

Here she found her younger sister Raonaid (17), who had bled to death after being stabbed repeatedly.

The laneway – situated between Silchester Road and Silchester Crescent – has been the subject of an exhaustive probe.

Female DNA – a tiny sample of unidentified skin – found under teenager Raonaid Murray's nails, is currently the only evidence the team have from the crime scene.

She had been socialising with friends at Scott's Pub in Dun Laoghaire, after finishing work as a shop assistant earlier that night.

Shortly before midnight, she was seen at the top of nearby Corrig Avenue by a female motorist who saw her in the company of a man she believed was "hassling" her.

Gardai believe she then walked alone along busy Lower Glenageary Road on her way to her parent's house in Silchester Park.

Minutes later she was attacked in a tree-lined walkway between Silchester Road and Silchester Crescent, where a plaque now stands in her memory.