reporter: jerzy borowczak is still drawn to the gates of the former gdansk shipyard.s a 22-year-old, borowczak worked closely with lech walesa to organise the strikes that ultimately forced the communists to negotiate. jerzy borowczak: back then, i'd selected two bearded collegues who looked like cuban revolutionaries. they carried walesa on their shoulders to the gate and helped him up on the car. the people shouted, 'get lech up, get lech up.' reporter: for borowczak, these are unforgettable memories of walesa as the strong, world-renowned labour activist, who stood up to the communists and won a nobel peace prize. but there have long been rumors that he was as a government spy in the early 1970's. now, a letter of intent has surfaced that supposedly confirms this signed by walesa, code-named bolek. and receipts have emerged. but borowczak doubts their authenticity. he says walesa only talked to the communists. jerzy borowczak: there was a captain who implored walesa to ensure no blood would be spilled. that's how it started. walesa never denounced anyone and never