It was a murder that shocked the nation; just over a year ago a schoolboy murdered his 15-year-old girlfriend after he made a bet with friends.

Joshua Davies, 16, told his peers that if he went through with the killing of Rebecca Aylward they owed him a free cooked breakfast. Shortly after, Rebecca was dead.

Tonight a documentary airs about this shocking crime  - but first Daybreak speaks to Rebecca's mum Sonia and her sister Jessica.

  • Britain's Darkest Taboos, 10pm, Crime and Investigation Network