Tonight: Behind Closed Doors: Fear and Control

Each week in Britain two women die at the hands of their partners - a statistic which highlights the scale of the challenge domestic abuse presents. A recent change in the law hopes to transform society's understanding and give the authorities a new tool to tackle psychological abuse and controlling behaviour. The Tonight team follow the police on call-outs as they make arrests under the new law, and talk to survivors of abuse - including one family whose daughter died at the hands of her partner.