Prime Suspect: Who Took Madeleine McCann?

It’s been 16 years since the disappearance of a three-year-old girl shocked the world. The German authorities now think Madeleine McCann was murdered by a drifter with a history of sexual violence. So, who is Christian Brueckner and how strong is the evidence against him? Reporter Richard Bilton, who has followed the case since the first days of Madeleine’s disappearance, travels across Portugal and Germany to find out more about the man suspected of abducting and killing her.