Considering we haven't executed anyone for espionage or treason since Julius and Ethel Rosenberg, I seriously doubt that's a likely outcome for him, especially since someone you're going to execute has little incentive to cooperate with the counter-intelligence response.<p>He'll get a few decades if he cooperates, and life if not: <a href="https://en.wikipedia.org/wiki/List_of_imprisoned_spies" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/List_of_imprisoned_spies</a>