I know a man named Angel who spent 21 years in prison for a murder he didn’t commit. During his incarceration, both his mother and the mother of his children died and he exhausted all his appeals. He was fated to die in prison without any chance of parole.

David Langwallner director of the Irish Innocence Project and Anne Driscoll, the organisation’s project manager, talk to Michael Clifford about the project’s work in trying to right miscarriages of justice, where people have been convicted of crimes they did not commit