The family of a teenager abducted and murdered by the IRA have made a fresh appeal for information, on the eve of the 40th anniversary of his disappearance.
Columba McVeigh from Dungannon, Co Tyrone was among 16 murder victims who became known as the “Disappeared”.
It is believed Mr McVeigh, who disappeared on 1 November 1975, was secretly buried at Bragan Bog in Co Monaghan where searches for the remains of the 19-year-old have so far proven unsuccessful.
The latest search for Mr McVeigh was in September 2013.
His brother Oliver McVeigh said: "Someone has the information that can end this inhumanity at absolutely no risk to themselves. It is all about information – we just need a little bit more."
Speaking from her home in Liverpool, his sister Dympna Kerr said the pain of his disappearance was still raw.
She said: "Every year that passes is harder than the last and this anniversary is particularly painful.
"If Columba had lived we would have celebrated his 60th birthday last September. Not only was that denied us, but we have nowhere to gather to mourn him."
In a statement, the Independent Commission for the Location of Victims’ Remains (ICLVR) said that a large area of the bog had been searched but information was now needed to refine it.
Speaking on RTÉ's Morning Ireland, Geoff Knupfer of the Commission, said while their searches for Mr McVeigh have not uncovered anything, they are confident that the information they have been given in relation to where he is buried is correct.
Mr Knupfer said he is sure there are more people with information that could assist them in their searches and he has urged them come forward.
He added that the commission can only use the information given to them for search purposes, and that it will not be handed over to An Garda Síochána or the PSNI.
Mr Knupfer said no one has ever been arrested or prosecuted as a result of assisting the Commission in the work.
To date, the ICVLR has recovered the remains of 12 people.
Last month, Kevin McKee and Seamus Wright were buried after more than 43 years. Their bodies were found in a shallow grave near Coghalstown in Co Meath.
Mother of 10 Jean McConville, from west Belfast, and Crossmaglen pensioner Charles Armstrong have also been found.
Mr McVeigh and three others, cistercian monk Joe Lynskey, SAS-trained Captain Robert Nairac and Seamus Ruddy, who is believed to have been buried in France, remain missing.
