U.S. government has failed to do enough to free him , Bob ##o 's son says . Family and documents strongly suggest Iranian officials tortured him . The family want U.S. to investigate Levinson 's connection with Iran ; officials have not . Absent any other word about their missing loved one , it 's the closest they have to proof that he was arrested and could remain in Iranian hands . Being up - front ` ` would be more of a positive step to getting him home , '' son says .
U.S. government has failed to do enough to free him , Bob ##o 's son says . Family and documents strongly suggest Iranian officials tortured him . The family want U.S. to investigate Levinson 's connection with Iran ; officials have not . Being up - front ` ` would be more of a positive step to getting him home , '' son says .