Transcript for The Other Side of the Iranian Prisoner Swap
republicans on the campaign trail taking aim at the white house over that prisoner swap with Iran and while the families of those freed Americans are celebrating what their loved ones another family is feeling betrayed. ABC's Brian Ross is here with that. Good morning, Brian. Reporter: Good morning, robin. That's right. The criticism is coming not only from republican presidential candidates but from the family of the one American who was not part of the deal, the American left behind. Under the deal, the U.S. Released from prison seven men convicted of helping Iran's nuclear program and dropped charges against 14 more. Republicans are calling it a bad one-sided deal. Fact is we shouldn't have to trade anything to get our citizens back home. We've got to take our head at how it's happening. Reporter: No one more upset with the Obama administration than the family of the American seen in this hostage video who was not part of the deal. Please help me. Reporter: Former FBI agent bob Levinson who disappeared in Iran almost nine years ago. The family heard the news on television, not from the white house. I'm very disappointed, I'm -- feel extremely betrayed by them. They have done nothing to get in touch with me other than after I asked them to. Reporter: Levinson's wife Christine and son Dan said the white house has gone back on its word. We have been given assurances over the years that my dad would be a top priority to get him home as much as everybody else if not more because he's been held for almost nine years. Reporter: A senior administration official tells ABC news that Levinson was part of the negotiations, but that the U.S. Does not know why he was not ultimately included in the swap. Mrs. Levinson, do you consider whether bob might have died in captivity. No, I will never consider that until I have proof. I believe every day he's trying to come home to our family. We will never give up. Reporter: The white house says the Iranians have promised to determine the whereabouts of Levinson, something the Iranians know full well and have known since he was first taken captive almost nine years ago. My heart goes out to the Levinson family.
This transcript has been automatically generated and may not be 100% accurate.