Doug
The Padilla affair?
See http://www.nybooks.com/articles/10580 An Open Letter to Fidel Castro signed by Sartre, J. Semprun a Spanish Communist who was imprisoned in a Nazi camp. (see his, "Literature or Life? Wrote the screenplay for Z.)
The show trial of General Ochoa, hero of the intervention in Angola including the battle of Cuito Cuanavale which delivered a hammer blow to the South African apartheid regime? http://www.nybooks.com/articles/article-preview?article_id=3816 The Trial that Shook Cuba
The treatment of Carlos Franqui, a M-26 guerilla w/Fidel and numerous other revolutionary artists of the 60's? (See Franqui's memoir as well as the memoir of Allende's Amb. to Cuba, J. edwards, "Persona Non Grata, " reissued by Nation Books.)
The turbas divinas (divine mobs) organized by CDR's to harass democratic dissidents? http://www.therealcuba.com/Page7.htm
The documentary, "No One Listened, " by Cuban Nestor Almendros, which was a recipient of a prize from HRW, has much on the repression of Cuban leftists during the 60's and 70's. See it.