I admit I haven't done too much digging yet, but if you read this, a US military assessment of him on Wikileaks, it does mention the contacts with al-Qaeda and other terrorist groups, but it doesn't mention any involvement whatsoever in violent actions. Is it enough to be jailed under normal circumstances - yes, of course, it's undeniably aiding and abetting terrorists, though I think it's a stretch to say it makes him personally a terrorist any more than, say, an Irish-American funding the IRA during the Troubles is a terrorist. Would it get him more than the twelve years in jail that he's already served - that, I'm not so sure of.

What's sure is that many people with much worse records have been released in the past as conflicts came to a resolution - and that people with much worse records have even been welcomed and fêted by the US or other Western governments, I doubt I need to provide examples. So yes, I can grant that Obama negotiated badly, but not that this guy was so horrible that he should never have been released, as a lot of people seem to be saying.

And do I think they're going to sit quietly in Qatar - not quietly exactly, no, but I do think Qatar doesn't want its reputation blemished by letting them slip away. Of course this is a morale-booster for the Taliban, which is why it should have been done in exchange for more serious concessions.