If they know who they are and have any amount of evidence at all, better to have a trial, better to try these people and show them the law is working than engage in a colossal cover-up because it doesn't suit the so-called peace process.
On the Left, we have leaders who, when given the facts about strategic options, decide they don't like the facts and make new ones up that suit them better.
And on the Right, we have leaders who, when given the facts about their political options, decide they don't like the facts and make up new ones that suit them better.