If the ChiComs were doing some really bad stuff, and we found out via an intel source in their hierarchy.
We may never know who, when, or ???.
Exposing that individual could not only endanger the individual, his peers and his family beside losing a vital intel resource.
If so, you might find out who/what/when, say 50 years from now.
"Those who know don't talk. Those who talk don't know."