The Quinn Support Group has stated it will campaign to bring those responsible for the murder of Paul Quinn in October to justice.
Over 300 people attended the group's second public meeting in Crossmaglen, south Armagh last night.
The organisation said it now planned to bring its case to Leinster House, Stormont and Westminster.
Mr Quinn (21), from Cullyhanna in south Armagh, was beaten to death in October by a gang of up to 15 men at a remote farm on the Co Monaghan side of the Border. His family has blamed the Provisional IRA.
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No one has been charged.