release. this time calling on the united nations to step in. no evidence has been produced of espionage or any other offense. he feels his brother s case got caught up in the nuclear talks. now that the deal is done he hopes the iranians will send his brother home. certainly i think the right thing to do would have been to release him long ago. the right thing to do is release him now. he is innocent. reporter: president obama under fire for striking the deal while the reporter and two other americans are still being held. a fourth american missing. and this week once again promised to spare no effort. we are not going to relent until we bring home our unamericans ununam our americans detained in iran. one adviser to the family tells me that he believes secretary kerry may have missed a window opportunity to secure the americans released before the deal was anounced.