While suspended from SIS on suspicion of disloyalty, he skipped a federal grand jury hearing on [[CPUSA]]. As a result, in November 1950 Weisband was convicted of contempt and sentenced to a year in prison. Weisband was never prosecuted for espionage because under the 1947 [[National Security Act]] "sources and methods" by law cannot be revealed. He died suddenly of natural causes in 1967. | While suspended from SIS on suspicion of disloyalty, he skipped a federal grand jury hearing on [[CPUSA]]. As a result, in November 1950 Weisband was convicted of contempt and sentenced to a year in prison. Weisband was never prosecuted for espionage because under the 1947 [[National Security Act]] "sources and methods" by law cannot be revealed. He died suddenly of natural causes in 1967. |