![FILE - In this March 6, 2012, file photo, an FBI poster showing a composite image of former FBI agent Robert Levinson, right, of how he would look like now after five years in captivity, and an image, center, taken from the video, released by his kidnappers, and a picture before he was kidnapped, left, displayed during a news conference in Washington. A federal judge has held Iran responsible for the kidnapping of former FBI agent Robert Levinson. U.S. District Judge Timothy Kelly entered a default judgement against the regime on the 13th anniversary on his disappearance. (AP Photo/Manuel Balce Ceneta, File)](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/5K2DN3IDO4ZVH7MBRK3JHPK7RY.jpg?smart=true&auth=a3f245910d956a7ef7baae51fc2ffb9ae17836ad16a1b7f77239957e6203ccc0&width=400&height=225)
An FBI poster from 2012 seeking information about Robert Levinson who went missing on Iran's Kish Island in March 2007. AP
An FBI poster from 2012 seeking information about Robert Levinson who went missing on Iran's Kish Island in March 2007. AP
Longest serving US detainee in Iran is dead, say family
Bob Levinson was last confirmed to be alive in 2011 but was missing for 13 years