refuse to release the spy s name but sources inside of the government and out tell cnn his name is rolando trujillo. these are believed to be pictures of him. now in his early 50s. he worked on encrypted communications for human intelligence assets but secretly working for the cia. he was discovered and convicted of of espionage in 1995. they say his work was instrumental in finding cuban spies and uncovered solt called the so-called cuban five, sources made years after trujillo went to prison. from intelligence perspective, you want to get as many spies and people they are working for them as possible and that is why it can take a long time even after their the spy was incarcerated initially by cuba. reporter: human rights activists say trujillo was held at one point in the same lockup