Paul Quinn's 15th anniversary mass will be held in St. Patrick's Church, Cullyhanna this morning.
The 21-year-old from Armagh was beaten to death by a gang of around a dozen men in a farm shed near Castleblayney, Co Monaghan, in October 2007.
Breege Quinn is still hopeful of getting justice in relation to the killing of her son Paul 15 years ago.
His anniversary mass is taking place this morning at 11.30am.
His mother told Northern Sound that she continues to fight for justice and she has great faith in the gardaí that the truth will come out about who killed her beloved son.