Today marks 50 years since the disappearance of Columba McVeigh.
Columba was abducted, murdered and secretly buried by the IRA in 1975.
The 50th anniversary of his murder and secret burial will be marked on Monday night.
An anniversary mass will take place in Donaghmore at 7.30pm.
A search that began in the Bragan Bog in Co Monaghan in August is continuing, as investigators prepare to move their focus to a new section of the bog.
Columba McVeigh's brother Oliver says his family just want to give him the Christian burial that he rightly deserves: