Forty years ago, Fr Patrick Ryan, a native of Doon in Co Limerick, was murdered in Texas.
He had been living in the USA for a just three years after a career largely spent in Ireland and Africa. Pretty quickly a native American man James Reyos was arrested and charged with the murder.
He was convicted and has spent the last four decades in prison or restricted in his movements on parole.
Now, new evidence has emerged to suggest that he was not murderer. So how did everybody get it so wrong and where are the suspects whom the police now believe were responsible for the death of a much loved priest?
reporter Ann Murphy has the story.