If the guy was innocent then a lot of people spent a lot of money trying to put a name on the perpertraitor. Don't forget the other accused was found not guilty. Cynics would cite lack of evidence.

In Scottish law the "not proven" verdict is still possible. It was not used by name.

Releasing him was an act of compassion, which the Lybian leader didn't seem to regard as needing any reciprocal understanding of etiquette. Just like the time he chose to sit beside Tony Blair and appear to western eyes as the picture of dimplomacy, only to have the soles of his shoes facing Tony Blair. The equivalent of the western insult of turning and presenting ones back.