Five-year-old April Jones was abducted and killed by Mark Bridger.

The crimes of Angus Sinclair, who murdered two teenage girls in 1977.

Estate agent Suzy Lamplugh showed a house to a client and was never seen again.

Dermot Murnaghan returns to uncover the truth behind the horrific crimes of Peterborough serial killer Joanna Dennehy.

Keith Blakelock is murdered during a riot on a housing estate in North London triggered after a black woman died of heart failure during a house search; Keith received more than 40 injuries during the sustained attack from a number of rioters.

Peter Tobin raped and murdered three young girls: Dinah McNicol, Vicky Hamilton, and Angelika Kluk; he has a history of violence, raping two 14-year-old girls and leaving them for dead.