Six weeks after the JFK assassination, a KGB agent who had been working for the CIA defected to the US, claiming to have information about Lee Harvey Oswald. Yuri Nosenko’s defection eventually led to purges in the CIA and still haunts the agency, with allegations of cover-ups of information relating to the assassination, and hints at the possibility of a mole in US intelligence.

Some of our Research:
Yuri’s Wiki
From the New York Times
Misrepresented facts?
An interview about Nosenko