Who is Sleeping in the Next Room?

The killing of Cerys Yemm at a B&B in Argoed made world headlines. Her attacker, homeless ex-prisoner Matthew Williams, died shortly after being tasered by police. His victim's mother talks for the first time about her family's reaction to the horrific discovery. Also, disturbing details of the guest list are revealed by the landlady who says she believes the council has been putting her and the community at risk.