A retired police officer of assistant chief constable rank or higher testified that the CIA planted crucial evidence which implicated Libya in the 1988 bombing of Pan Am flight 103 in Lockerbie, Scotland, calling into question the conviction of Abdel Basset Ali al-Megrahi.
The vital evidence that linked the bombing of Pan Am 103 to Megrahi was a tiny fragment of circuit board which investigators found in a wooded area many miles from Lockerbie months after the atrocity.
The fragment was later identified by the FBI’s Thomas Thurman as being part of a sophisticated timer device used to detonate explosives, and manufactured by the Swiss firm Mebo, which supplied it only to Libya and the East German Stasi. . . .
The fragment of circuit board therefore enabled Libya — and Megrahi — to be placed at the heart of the investigation. However, Thurman was later unmasked as a fraud who had given false evidence in American murder trials, and it emerged that he had little in the way of scientific qualifications. — Scotsman.com
There’s much more at the Scotsman, especially if you aren’t familiar with the details of the Lockerbie bombing. This stood as the largest terrorist attack against Americans prior to 9/11, killing 270, of which 189 were Americans.