It's 21 years today since the murder of Raonaid Murray.
The 17-year-old was found stabbed to death near her home in Glenageary at half past midnight on the 4th of September 1999.
Gardaí say they've never had a prime suspect, and they've never known the motive.
They're asking anyone who knows something or doubts an alibi for that Friday night to make themselves known - as they may "unknowingly be shielding a killer."
Raonaid Murray was last seen alive at approximately 11.20pm on Friday, 3rd September 1999 when she made her way home from Dun Laoghaire town centre. Her body was then found at Silchester Crescent, Glenageary at 12.33am, Saturday 4th September 1999, less than 500 yards from her home.
Reflect
Gardai say: "Many who were then Raonaid’s age are now parents themselves with children, some of whom would now be close to Raonaid’s age, and we would ask them to reflect now with the benefit of maturity and hindsight on any information which may be of assistance to the investigation.
"Despite a large number of suspects having been identified during the course of this investigation, there is in reality no prime suspect. The lack of a prime suspect largely arises from the fact that there has been no motive identified in this case. In over 4500 witness statements there is not one word of enmity towards Raonaid."
Motive
Gardai add: "If any person has any information which could assist in identifying a motive for the murder of Raonaid and/or if any person has any doubts about the truth of an alibi already provided, we would appeal for your immediate assistance.
"You may unknowingly be shielding a killer.
"The solving of this murder is of the utmost priority for An Garda Síochána and any information received will be treated with absolute confidentiality."
Information
The Gardaí and Raonaid’s family continue to work together in an effort to solve this case and they appeal to anyone with information to contact the Garda Incident Room at Dun Laoghaire Garda Station on 01 666 5000 or 01 6665012, the Garda Confidential line 1800 666 111 or any Garda Station. A reward for critical information received is available from Crimestoppers, Freephone 1800 25 00 25.
