Spy helped unmask 3 Cuban spy networks, U.S. officials say

"The CIA’s Latin America Division has run many spies in Cuba, but Rolando Sarraff Trujillo was in a class all his own.From his perch as a cryptographer in Cuba’s Directorate of Intelligence, Sarraff was able to provide information that repeatedly helped the U.S. intelligence community crack encoded messages the Communist government was sending via shortwave radio..."

http://www.washingtonpost.com/world/national-security/spy-helped-unmask-3-cuban

WASHINGTON — He was, in many ways, a perfect spy — a man so important to Cuba’s intelligence apparatus that the information he gave to the Central Intelligence Agency paid dividends long after Cuban authorities arrested him and threw him in prison for nearly two decades.

Rolando Sarraff Trujillo has now been released from prison and flown out of Cuba as part of the swap for three Cuban spies imprisoned in the United States that President Obama announced Wednesday.

 http://www.nytimes.com/2014/12/19/world/americas/cia-mole-now-out-of-prison-help