COLD-CASE detectives and local gardaí investigating the murder of teenager Raonaid Murray 10 years ago are to travel to the UK in the coming weeks to reinterview witnesses who were with her on the night of her killing.

It is understood that gardaí want to reinterview at least two people who were with, or were in contact with, the 17-year-old on the night she was murdered. "It was 10 years ago, a lot of people Raonaid knew have moved away. As part of the investigation we're reinterviewing everyone and some of those people now live outside Ireland and we intend to travel to the UK," said a well-placed source.

Raonaid was murdered after leaving Scott's pub in Dún Laoghaire, Co Dublin, on the night of 4 September 1999. She left her friends about 11.30pm and started the 15-minute walk back to her family home in Glenageary.

She was stabbed four times, with a one-and-a-half-inch sharp knife in Silchester Crescent. Her murderer escaped and Raonaid staggered some 200 feet before she collapsed and died from her injuries. Her body was found by her sister Sarah, less than 30 minutes after the assault.

The investigation into Raonaid's murder was one of the most extensive ever carried out by An Garda Síochána. Some 13 months ago, the garda cold-case team recently began reviewing the killing and it is expected the investigation will continue for about another six months. "It's a case we are focused on and determined to do everything within our power to solve," added the source.

Preliminary investigation by the cold case unit has identified a litany of mistakes in the original garda probe.

A website – www.raonaid.com –dedicated to the memory of Raonaid which appeals for help in finding her killer was launched by her family yesterday to mark the 10th anniversary of her death. Her family said they launched the site, "to pay tribute to Raonaid, and to honour her beautiful life, which was tragically taken from her".