Catching a Killer: The Murder of Emma Caldwell

The murder of a young woman. A botched police inquiry. And the BBC Disclosure investigation that helped catch the killer. As the man who murdered Emma Caldwell is finally brought to justice, reporter Samantha Poling reveals a catalogue of missed opportunities by police to catch him. The inside story on how this left Emma's murder unsolved for nearly two decades, while a dangerous predator was free to continue raping and assaulting other women.