Reports are that Hell is heated.
I’m merely pointing out that Costa Rica, is a damned sight better than hiding and eeking out an existence on the Appalachian Trail where he could be captured at any moment. It’s not like he can just re-enter society in a few years when this blows over.
He could, for the most part go un-noticed in Costa Rica. Plenty of American ex-pats to blend in with, and no extradition if he does get caught.
This assumes he’s not alligator bait, or otherwise at ambient temperature.