He also called a sexual assault support centre in Cornwall and pretended he had been raped by his landlady.
He has requested 12 weeks to prepare for the battle.
The case has drawn international condemnation ahead of the teenager's sentencing this week.
What a story.
This 18-year-old killed his own sister during a satanic ritual.
When bad boys are your type.
Mum of the year.
Has he turned over a new leaf?
Gazza's gonna Gazza.
The saga continues.
If he dies, he dies.
I knew it.
Witness protection with a massive 69 tattooed on your face.
Can anyone help?
She has shared footage of her injuries.
Looks innocent if you ask me.
Now that's justice.
Good for him.
She was shouting at her ex Kieran Hayler's girlfriend.
That's not good.