A 59 year old man will bid to have his conviction for killing a teenager in the Wicklow mountains almost 40 years ago overturned later today.

Martin Conmey, of Porterstown Lane in Meath, is claiming that new evidence not available at the time of his 1972 trial will prove that he was not responsible for 19 year old Una Lynskey’s death.

Una Lynskey worked as a civil servant in Dublin and one night in January 1971, after being dropped off by the bus in Meath, she disappeared.

Her body was found in a ditch in a remote part of the Wicklow Mountains two months later.

Martin Conmey and a another local Rathoath man, Dick Donnelly, were convicted of her manslaughter in 1972.

Both men launched an appeal and Mr Donnelly’s conviction was overturned – but Conmey served 3 years in prison.

He will today bring a fresh challenge before the Court of Criminal Appeal on the grounds that he has new evidence to support his case.

The hearing is expected to run for four days before the three judge court.