Only two other disappeared victims, John McClory, 17, and Brian McKinney, 23, murdered in 1978, were found in June after long digs.
BBC: Victims' sons lose faith in search
2.
Last year, Gardai recovered the bodies of Eamon Molloy, left in a coffin in a graveyard in County Louth, and John McClory and Brian McKinney, whose remains were found after weeks of digging in County Monaghan.