I dont understand what a pardon or a medal will accomplish. At this point I would assume that the moment the US is aware of his ___location he would be snuffed out, as discretely as possible. Unsure if there are any verifiable marks that prove he's even still alive (like him sending signed messages or something?).
He already did the thing. Do you think he poses any more real risk beyond that of potentialially becoming a martyr? While it's likely some people wouldn't want him being the voice for some things now. Anyone could probably do that just fine. I'd be surprised if anything happens to him beyond maybe putting him behind bars.
