"United Against was founded in 2008 by a former CIA director and a group of retired diplomats to advocate against the nuclear Iran. Its board includes former directors of foreign intelligence services including the U.K.'s MI-6, Germany's BND - and Israel's Mossad."
So basically the defendant, "United Against Nuclear Iran", is an extended branch of several governments' spy agencies and enjoys all the protections that result from that status.
Seemed she worked for them to get everything set up (which makes sense as Wallace seems to describe her as his right-hand woman https://books.google.com/books?id=v5owKbDSg7kC&pg=PA125&lpg=... ), and is now working for the State Department but has a long history of roles high up in the last administration.
So basically the defendant, "United Against Nuclear Iran", is an extended branch of several governments' spy agencies and enjoys all the protections that result from that status.