Gardaí have arrested a man in his 40s in connection with the death of Martin Nolan (34) whose body was found burned in Waterford in 1999.
The man was arrested in Dublin airport yesterday and brought to Waterford for questioning over the possession of a firearm.
He was being held under Section 30 of the Offences against the State Act.
Mr Nolan of "An Halla", Newtown House, Tramore, Co Waterford, disappeared on November 10th, 1999, just days before he was due in Waterford Circuit Court to face charges relating to the possession of thousands of euro worth of cannabis and ecstasy for sale or supply.
A 2006 a trial, in which a man (37) was convicted of perverting the course of justice in the case, heard Mr Nolan was last seen near the Avondale housing estate in Waterford at around 7pm on November 10th, 1999.
His father and brother noticed he was missing the next day and called gardaí.
A few days later forestry officials noticed "fresh blood covered by sand", and gardaí discovered a piece of bone that they believed to be human.
A few months later two fishermen were in the Clondonnell woods on the south Tipperary and Waterford border and saw a fire. However, it was not until July 5th, 2000, that the two men returned and discovered a makeshift funeral pyre containing Mr Nolan's remains at Clondonnell, a wooded area in the Comeragh Mountains, about five miles from the village of Rathgormack.