Gardai have refused to hand over a Garda file on the 1996 disappearance and subsequent discovery of the partial body of Denis Walsh Jnr.
His father, Denis Walsh Snr, has briefed lawyers to prepare proceedings against the State over how he claims the case was handled.
In another twist in the tragic 26-year investigation, Denis Walsh Snr spoke publicly for the first time that a letter was delivered to his home last year which claimed his son was murdered by a man in Limerick.
