Erik Heine's CIA file - 5 volumes
   [1]https://archive.org/details/HeineErik
   According to the New York Times, he was discredited as a KGB agent
   under CIA orders. It'll be interesting to dive
   [2]http://jfk.hood.edu/Collection/White%20Materials/Security-CIA-II/CIA
   %20II%20045.pdf

References

   1. https://archive.org/details/HeineErik
   2. http://jfk.hood.edu/Collection/White Materials/Security-CIA-II/CIA II 045.pdf