Wander00 - yes I listened to The Reunion as well. The families of the Omagh victims were all badly let down by the authorities on both side of the border, including bungling of evidence by the RUC as it was at the time, which lessened the chances of a criminal prosecution.
As to the "let the sleeping dogs lie" attitude, as some lady on the Today programme said this morning, if we can prosecute men for feeling up girls 40 years ago, it's unthinkable that we shouldn't do the same for murderers.