If he was a Russian asset, wouldn't it be smarter to keep working within the NSA and leak the knowledge/tech to them? Now you might next claim he was probably

If he was a Russian asset, wouldn't it be smarter to keep working within the NSA and leak the knowledge/tech to them? Now you might next claim he was probably doing that and he fled as he was about to be caught by the NSA, but if they had suspicions of espionage and was about to arrest him, they would've gone to the press, that a (suspected) Russian mole had escaped and shown their evidence...