The whole tale involves to much complexity to unravel here, but questions resurface:
What instruments are used to root out counter-espionage, given the special challenge? By definition the spies are culturally complex–spying on China means knowing the language and culture well, perhaps being native-born.
Why such long trajectories from firm suspicion to actually taking action against suspected traitors?
What’s new in this case? Did you notice the mention of “a decade” passing after Lee’s last service in the CIA, and only now an arrest. What’s up with that?
Spy watchers have a lot to chew on here…at several levels.
(Much more detailed articles on this case can be Googled. And stay tuned.)