Transcript for Ex-FBI Agent Bob Levinson Pleads for Help
One of those videos that fills Americans with anger and horror an American man pleading for help. He vanished in Iran four and a half years ago and on the tape this 33 year veteran of the FBI. Asks the US government to reward his service and come to his aid. ABC's chief investigative correspondent Brian Ross on the tough choice facing in the US tonight. Beautiful well mom -- wife Christine. American officials thought Levinson was dead until there's proof of life hostage video was sent to his wife in an anonymous email. -- posted today on his family's web site. -- -- -- -- -- -- -- -- -- -- Has probably lost about 75 pounds. And the shirt he was wearing is actually the search. He wore when he disappeared. The former FBI agent was working as a private investigator. When he disappeared in 2007. On the Iranian resort island of -- where Americans can go without a visa. And it remains a mystery as to who in Iran kidnapped Levenson or why. On the video recorded at least a year ago Levenson purposely avoids naming his captors in his plea for help. -- review news service. The United States. There's something. The -- families as it posted the video and its own statement with mrs. Levinson wearing a head scarf and her son David next -- in an effort to start negotiations. With whoever has. Please help us. We tried to contact you. But you never responded Levinson has seven children and two grandchildren one he has never meant and the holidays the family says are especially hard. The frustration is that every day passes and he's still not home with us and I don't know how to get him home. Iran has denied holding Levinson but US officials believe someone or some faction that country is responsible and in control of the American states. ABC news has learned that FBI officials have had direct talks with the Iranian officials in Europe. The recent tensions with the -- including this week's captured drone have badly disrupted efforts to free their former -- --
This transcript has been automatically generated and may not be 100% accurate.