Capt . Wren Thomas was kidnapped from his ship off Nigeria . He was held in jungles and swamps while captors demanded ransom . During interrogation , FBI said it could be Boko Haram terror group , Thomas says .
Capt . Wren Thomas was kidnapped from his ship off Nigeria . He was held in jungles and swamps while captors demanded ransom . During debriefing , FBI said ransom could fund Boko Haram terror group , Thomas says .