No value in keeping him alive? With no secrets held anymore, he’s not a threat. It’s not like he’s a super-spy or real terrorist that will infiltrate the NSA again stealing more secrets. There’s no real use killing him, except for retribution, and with all the news organizations on him, that’s highly unlikely.
They just want to catch him and bring him back to face charges… And this time, since he’s not military, it’s going to be a real trial with a jury. What a press field day!