Ethel Rosenberg
“Ethel and Julius Rosenberg were executed for espionage in Sing Sing Prison on 19 June 1953. They had been convicted of giving American atomic secrets to the Soviets during World War II. Though the government was convinced of their guilt, many people were not and the debate over their guilt or innocence did not stop with their deaths. Subsequent declassified government documents have however indicated that Julius Rosenberg did indeed spy for the Soviets but that the government's case against Ethel Rosenberg was quite weak.”