Becky Watts case: Nathan Matthews 'graphically described killing' her

Becky Watts vanished on 19 February and her body was discovered on 2 March

A man accused of murdering teenager Becky Watts "graphically described" how he would kill her, a court heard.

Becky's best friend Courtney Bicker, 17, told police in a recorded interview that Becky was "a bit scared of" Nathan Matthews, Bristol Crown Court heard.

The interview on 2 March was made while the 16-year-old was still missing and hours before her remains were discovered at a house in Bristol.

Mr Matthews, 28, and his girlfriend Shauna Hoare, 21, deny murder.

'Wounds and stuff'

In the interview Ms Bicker said: "Becky's told me a few times, like this has happened a number of occasions, that Nathan would graphically describe how he would kill her."

The court heard Ms Bicker say that Mr Matthews talked "in detail" about "wounds and stuff", and that Becky appeared troubled by this.

She said she had never heard Mr Matthews talking about killing Becky and that when she was around him, "it seemed fine, like a normal relationship".

The court then heard from Nathan Matthews' grandmother, Margaret May.

More dominant

She said she felt Mr Matthews' "mental health" had gone downhill and he "became paranoid about things" in the last couple of years.

She also said she did not approve of his relationship with Shauna Hoare when it started as Ms Hoare was 15 while Mr Matthews was 21.

Asked who was the more dominant, she said: "Shauna in a lot of ways. She very often told him what to do."

Mr Matthews, 28, of Hazelbury Drive, South Gloucestershire, admits killing his stepsister but denies murder and conspiring to kidnap her.

He also admits perverting the course of justice, preventing Becky's burial and possessing a prohibited weapon.

Miss Hoare, 21, of Cotton Mill Lane, Bristol, denies murder and conspiracy to kidnap, the weapons charge, perverting the course of justice and preventing a burial.

Two other men, Donovan Demetrius, 29, and James Ireland, 23, deny assisting an offender.

The trial continues.