http://observer.com/2016/08/breaking...nside-the-fbi/
Chinese obviously. And he was allowed to get away with it for longer than he should have because of... "well we dont wanna be racist."
Some choice quotes:
"The FBI had no stomach for a messy spy scandal coupled with the inevitable claims of ‘racial profiling'."
"it’s worse for your counterespionage career to be accused of racism than to miss the mole right in your midst"
"Beijing expects its nationals overseas to serve as their spies abroad, and some of them are quite willing to do so"