Login to unlock this video.
If you don't already have an account, sign up to enjoy more TVNZ content anytime, anywhere.
AO Returning: Carolyn Robinson hosts a new season of 20/20. Tonight, 20/20 reveals the shocking details about the captivity and fight for freedom of American ISIS hostage Kayla Mueller.
Keep up to date with the best of international current affairs.
Titles, characters and all other elements are the trade marks and copyright of TVNZ or its licensors. All rights reserved. Further details available here.