Bertil Stroberg, 79, a former Swedish air force officer who was convicted of spying for Poland during the Cold War but always maintained his innocence, died in Stockholm on March 25 following a yearlong battle with cancer.
Stroberg was sentenced to six years in prison for spying in 1983, but released on parole after serving three years.
The key evidence in his case was a letter the prosecution said he had written to the Polish Embassy offering to sell military secrets. Handwriting experts failed to link the letter to Stroberg.
