Having been convicted of Una Lynskey's murder, Martin Conmey and Dick Donnelly began their sentences in Mountjoy prison in 1972.

For Martin, his release almost three years later was supposed to mean a return to normality and a fresh start, but he found it almost unbearably hard to live with everything that had happened.

However more than a decade later, one seminal moment in the history of The Troubles would ignite a determination in Martin to challenge the might of the State once more.

It would take a change in the law, the unyielding love of his family, and yet more battles in the courtroom, but Martin set out to try get his conviction quashed.

Just a few months after the horrific events of December 1971, Martin Conmey and Dick Donnelly were charged Una Lynskey's murder.

Martin had made a false confession to gardaí at Trim Garda Station, however Dick refused to sign anything despite claiming he came under similar pressure.

They each hoped that the truth would emerge before the judge and jury at the Central Criminal Court in the height of the summer of 1972.

In this episode, we'll bring you into the courtroom for those 13 days of evidence - could they put their faith in Lady Justice?

Having made false confessions to gardaí, Martin Conmey and Marty Kerrigan hoped the truth about what happened to Una Lynskey would emerge somehow, and this would lift the finger of suspicion.

Her body was found before the end of 1971 and the investigation into her disappearance was upgraded to murder, but unfortunately it only added fuel to the fire of rumours already doing the rounds of Porterstown Lane.

And very quickly afterwards, an act of misplaced vengeance would soon bring more tragedy to the lane.