Girl, 15, 'felt like murdering for quite a while'

A 15-year-old girl who helped plan the killings of a mother and daughter had "felt like murdering for quite a while" and was relieved once the victims were dead, a jury has heard.

The teenager, who cannot be named because of her age, told detectives her boyfriend "seemed fine" after he stabbed Katie and Elizabeth Edwards to death with a kitchen knife.