Meanwhile, the news Lord Boyd is due to become a judge has provoked criticism.
He led the prosecution of the man convicted of the Lockerbie bombing, and was criticised by the Scottish Criminal Cases Review Commission for failing to disclose information to Abdelbaset Ali Mohmed al Megrahi's defence. He rejected the claims.
When he resigned as Lord Advocate in 2006 there was speculation his decision was connected to the Shirley McKie fingerprint inquiry and Lockerbie case criticisms. He denied that and said it was just time to move on.
Ms McKie's father Iain said the news "took my breath away". He said: "That the Judicial Appointments Board should recommend to the First Minister that Lord Colin Boyd be appointed as a judge to the highest court in the land set new standards for being out of touch."
Tam Dalyell, the former MP and father of the house, said: "The fact he may well become a judge should not inoculate Lord Boyd from the obligation to answer questions on Lockerbie over the period that he headed the Crown Office.
"The Crown Office, and I would have thought Lord Boyd in his position in the Crown Office, have an obligation to address powerful criticisms of non-disclosure."