EDIT 2:
Now that's a coincidence.
Communism expert Trevor Loudon seems to think the Goleniewski Story to be credible in his most recent interview with another expert of Communism, J.R. Nyquist:
EDIT:
This is most likely bullshit, sorry.
There is no KGB-defector called "Aleksei Goleniewski".
There is only this guy:
https://en.wikipedia.org/wiki/Michael_Goleniewski
The author Frank Capell does not seem to be a reliable source either.
https://en.wikipedia.org/wiki/Frank_A._Capell
https://www.cia.gov/library/readingroom/docs/CIA-RDP75-00149R000300140001-6.pdf