According to some historians, it was possible that Kukliński was a double agent, of the Soviet GRU, used in an operational game with the CIA. A Polish Minister of Internal Affairs during communist times, Czesław Kiszczak revealed such a theory in a later interview, while a former Soviet military attaché, Yuriy Rylyov, claimed so directly in an interview. Historians, like Paweł Wieczorkiewicz and Franciszek Puchała (a general in the Polish Army during communist times) suggest, that the knowledge Kukliński had was exaggerated, and while he had a lot of information about the Polish Army and the organization of the Warsaw Pact in general, he could not have had detailed information on Soviet plans, since no one in Poland had it. Puchała supported his opinion in official hearings of Kukliński by Polish prosecutors during his revised trial. Revealing plans about the enforcement of martial law in Poland, which would make a Soviet invasion unnecessary, could have been profitable for the Soviet side, ensuring that the USA would not be surprised by martial law and would not undertake unpredictable actions against the Soviets. It is noteworthy, that despite Kukliński's revelations, the USA did not warn Solidarity about martial law. The Soviets took the escape of such an important spy nonchalantly and did not demand any consequences from the Polish politician responsible for intelligence, namely Czesław Kiszczak. Also, the matter of Kukliński's sons' deaths is unclear and they may have been part of a protection program; besides, according to Wieczorkiewicz, such revenge on a defector's family would be quite unusual for Soviet intelligence.