Lets see. You have a high level figure arrive in your country. He is a US national. A country you spend a great amount of time, money still spying on. (The cold war never offically stopped - US vs Russia spying still goes on).

You know the figure worked in key area's of the NSA. His own passport has been cancelled. He is in a precarious position diplomatically and he is on your "home turf".

Any Spymaster worth their salt would not hesitate to act. To debrief and learn as much information the person has in exchange for asylum.