The sister of Columba McVeigh says there's still time for someone with information to do the right thing and come forward.
In 1975, the Tyrone teenager was abducted, murdered and secretly buried.
He is one of the three Disappeared victims whose remains have yet to be recovered.
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It's believed Columba's remains are buried in Bragan Bog in north Monaghan, however a number of thorough searches by the Independent Commission for the Location of Victim's Remains have not been successful.
As Columba's birthday approaches, his sister Dympna Kerr made this appeal.
