The judges have revealed the names of two fifteen-year-olds, Kim Edwards and boyfriend Lucas Marham after Kim's chilling confession, who alongside her boyfriend plotted to brutally murder her mother and her 13-year-old sister in April 2016.
The victims Edward's mother, dinner lady Elizabeth Edwards, 49, and sister Katie were stabbed in 'brutal executions' as they slept in their Spalding home in Lincolshire, last April.
Speaking to the police after the killings, Kim said she let Lucas kill her mother by slashing her throat open with a kitchen knife, while she recoiled in a foetal position and later sent Lucas to kill her sister Katie, listening from the bathroom while she begged him to spare her life.
Kim told police officers: “The plan was to murder my mother and sister. Ever since I was young, I never got on with my mum. I knew she favoured my sister more than me. She said she didn't but I knew she was lying.”
The 14-year-olds did not leave the house after the murders, they changed into fresh pyjamas, went downstairs to avoid the smell of blood, ate, drank and had sex, shared a bath and watched Twilight vampire films as they 'revelled' after the killings.
Kim backed out of the suicide plans after the murder. She stayed normal, without any remorse and went to school the following day.
Lucas' aunt reported him missing when she realised he was not at home and when the police broke down the doors 24 hours later to get into the house, the couple were found casually sitting in the living room.
When asked what had happened, Lucas told the police: “Why don't you go up and see?”
The young couple have been detained for life with a minimum term of 20 years last November, by a judge at the Nottingham Crown Court who described the case as something that had “few parallels in modern criminal history.”
