The real reason is that the probe might also have had to disclose what President Obama and Attorney General Eric Holder knew and when they knew it. Thats because the London Times on Sunday published a letter written by deputy US ambassador Richard LeBaron in the days before Megrahi was set free, telling Scotlands first minister that, while the Obama administration opposed the terrorist bombers release, it was nonetheless “far preferable” that he be sprung on compassionate grounds than be moved to a Libyan prison.