|Danish teen murders her mum after watching ISIS beheadings|
Lisa Borch was aged only 15 when in October last year she spent hours on YouTube watching footage of the savage decapitations of David Haines and Alan Henning.
Afterwards she and her radical Muslim boyfriend Bakhtiar Mohammed Abdulla, 29, took a long-bladed kitchen knife and stabbed her mother Tina Römer Holtegaard at least 20 times at the home they shared in rural Kvissel.
A court which sentenced Borch to nine years in jail heard how she became obsessed with militant Islam after falling in love with a unnamed Muslim .
But he jilted her when he moved back to Sweden to be with his wife and children.
Nevertheless she found a new soulmate in Iraq-born Abdulla, whom she befriended after meeting at a refugee centre near her home.
Following the brutal murder, in which both Borch and Abdulla participated, the teenager called police claiming: 'I heard my mother scream and I looked out the window and saw a white man running away. Please come here, there is blood everywhere.'
On arrival police found Mrs Holtegaard, whose husband was away on a short business trip at the time of her murder, covered in her own blood in bed.
Despite making the frantic phone call, the victim's daughter was discovered sitting on a chair in the living room playing with her iPhone and watching videos on YouTube. When police asked where her mother was, Borch refused to leave her computer and simply pointed upstairs.
Brainwashed: The court heard how Borch (pictured) became obsessed with militant Islam after falling in love with a unnamed Muslim.
A later police examination of the computer showed that she had watched endless repeats of the beheadings of the two Britons, both of whom had gone to Syria on humanitarian missions.
'She watched them the whole evening long,' said prosecutors at her trial. When police first arrived at the house she didn't leave the computer and merely pointed upstairs to indicate where her mother lay dead. It was this apparent disinterest which made her prime suspect in a matter of minutes.
The court heard that Borch's twin sister had recently moved out of the family home because she couldn't stand the constant arguing that went on between her mother and sister.
Prosecutors said it was this 'endless rowing which cost the mother her life.'
Borch claimed at the trial that they were 'just good friends' but authorities believe they were lovers.
The rows with her mother intensified as she pressured her daughter to break off her relationship with him and 'live the life of a normal teenager.'
Prosecutor Karina Skou told the court that the pair made a diabolical pact to kill her mother saying: 'This murder was cold blooded, ice cold and committed in a bestial manner.'
Borch even showed her twin sister the knife she planned to use to kill their mother, but the comment was incorrectly written off a macabre joke.
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