On April 15, 2016, Kim Edwards and her boyfriend Lucas Markham, both just 14 at the time, murdered Kim’s mother and younger sister.
The bodies of Elizabeth Edwards, 49, and her daughter Katie, 13, were found in their Spalding, U.K. home.
Kim and Lucas were arrested and charged with the killings, making them the country’s youngest double-murderers.
They were quickly dubbed the “Twilight killers” after it was revealed that after the pair stabbed Elizabeth and Katie ten times as they slept, they had sex, cleaned themselves up, ate tea cakes and ice cream, and watched the movie Twilight.
Kim and Lucas' identities were only revealed to the public earlier this month after they were found guilty of the two murders and handed life sentences. They will both spend at least 20 years behind bars.
Now, Lucas' chilling confession to police about his role in the murders has been released to the public, as part of a new Channel 5 documentary, Murdered By My Daughter, which aired in the U.K. last night.
According to The Sun, the documentary reveals Lucas was angry that Kim's mother had tried to end the young couple's relationship.