had been shot, stabbed or something had happened to him. >> reporter: four days later, markov was dead. his widow annabelle also appeared in the documentary. >> he told me that he had been jabbed with an umbrella tip. it was almost as if he didn't want to believe it himself, and i don't think he wanted to frighten me with it. but he showed me the mark that the umbrella had made. >> reporter: this document allegedly shows the former bulgarian leader paid $50,000 to have markov killed. other bulgarian communist officials and soviet kgb officials were implicated but no individual has ever been charged with the murder. in the documentary, markov talked about government plots against him and defected from bulgaria. >> i don't want to say that i am braver or more honest than other people. perhaps if i were more honest, i should have been there, because if you're honest you should stay there, fight the battle there, not be here. >> reporter: markov was 49 when