For years police suspected Levi Bellfield of crimes including sexual assault, GBH, abduction, drug rape. There was never enough evidence to charge him. Then they began connecting him with the murders of young blonde women.

Millionaire Peter Morgan's mid-life crisis involved moving a young mother, Georgina Symonds, into one of his properties, paying her thousands a month to be his 'girlfriend'.

Breck Bednar was a 14 year old seduced by the world of online gaming. He didn't see the dangers when an older teen made lucrative job offers, and began turning him against his family.

Sabrina Kouider couldn't have lived such a glamorous lifestyle without the help of Sophie Lionnet, the young French au pair who looked after her children. What Sophie didn't know was that her employer was gripped by frenzied delusions and paranoia.

When landscape architect Joanna Yeates disappeared after work Christmas drinks, the nation was gripped by the search for her.