AP Photo

On the evening of July 22, a string of revealing text messages and phone calls circulated between Cuba, Sweden and Spain and back to Cuba — where Oswaldo Payá, one of the country’s bravest and most influential dissidents, was lying dead on a rural highway. That, anyway, is the story of Regis Iglesias Ramirez, an associate of Payá and former political prisoner who says he is determined to expose what he believes was a state-sponsored murder.