"Mark was an innocent victim of his father's monstrouscrime who succumbed to two years of unrelenting pressure from false accusations and innuendo, " Flumenbaum said.
Lord Selkirk, who was a Scottish Office Minister in 1988 and one of two ministers who attended the scene within hours of the attack, said that the families needed to know "exactly what happened" and "the background to this monstrouscrime".