Voice of a Serial Killer

When Becky Watts disappeared the country was anxious for her return until police find her body. Soon stories don't add up and a computer history shows that evil lies close to home.

As Paul Bernardo and Karla Homolka exchanged vows, the remains of Leslie Mahaffy were being pulled out of Lake Gibson. But when the marriage starts to falter, secrets are spilt.

After the death of her husband, author Helen Bailey found happiness in a new partner. But when she disappears two years later, friends and family start to ask questions.

Jennifer Pan witnessed the murder of her mother and the attempted murder of her father. But when he wakes from a coma, her father has a very different story to tell.

How do the FBI find a killer with no victim or geographic profile and who covers his trail with counter forensics. And if they can find him, how would they prove responsibility?

A fraternal bond can be unbreakable, with secrets and codes based on favourite films and silly plans. What happens when a body is found and the codes are used for murder?

When a criminal on probation embarks on a killing spree of ex-lovers, police try to get ahead of the man who will later insist that he is a victim and that society is to blame.