For foregners, they don't get that we only got "control" of the scots because we invited a scottish king
to rule when Liz 1st died (Why didn't you have kids? IT'S NOT HARD. Well, contexts and everything.) If they want to do something,
the English government basically have to say "Do this now" and the Scots just go "Go DO your mother."
Now, to the point. No, he shouldn't be released. But no, he shouldn't be given the death penalty. Life Imprisonment with no parole in solitary confinment. All he gets is a bed, clothes, a toilet, a sink, and maybe a shower. He gets his 3 meals shoved through a hole in the door. I think a few years of that is a bit more fitting than a bullet/noose/injection.