Becky Watts murderer should never be released - brother
The brother of "funny and feisty" Becky Watts has called for her killer stepbrother never to be released as he is "gone in the head".
Nathan Matthews, 28, targeted the teenager in a sexually motivated kidnap plot with his girlfriend Shauna Hoare, 21, on February 19.
The couple, who shared an interest in petite teenage girls, let themselves into 5ft 1in Becky's home in Crown Hill, Bristol, when they knew she was alone.
They brought tape, handcuffs and at least one stun gun to the semi-detached property to subdue the student to come with them.
Detectives say the truth about what happened to Becky may never be known but she suffered more than 40 injuries before being suffocated.
Matthews and Hoare then bundled her body into the boot of their Vauxhall Zafira, before dismembering it with a circular saw in their bath.
The former TA soldier was convicted of Becky's murder and jailed for a minimum of 33 years following a five-week trial at Bristol Crown Court.
Hoare was jailed for 17 years after being found guilty of Becky's manslaughter. Both were convicted of conspiring to kidnap her.
Mr Justice Dingemans was in tears as he paid tribute to Becky's family and spoke of the "immense burden" the trial had placed on them.
Speaking to Sky News, Daniel Watts, 20, said he believed the sentence handed to Becky's murderer was "not enough".
"He will be 61 when he gets out and he will still be looking for teenagers," he said. "He's just gone in the head.
"When I was living there, when I would go there from my mum's they would just be like brother and sister, like playing, play fighting, joking about.
"I never knew the way he was thinking and stuff in his head. I would see them joking about, it was like a love hate relationship."
Mr Watts described Matthews, who watched pornography on an almost daily basis to satisfy his lusts, as an "animal"
"Obviously he never showed that side to me when I was younger," he said.
"The betrayal from him is unbelievable."
When asked what would mean justice for Becky, Mr Watts replied: "Him dead".
"Throw him in a room with like our family and then watch what happens," he added.
Mr Watts went to live with his father, Darren Galsworthy and stepmother Anjie Galsworthy - Matthews's mother - when he was aged six and Becky was three.
In a victim impact statement read to court at Matthews and Hoare's sentencing, his mother Tanya Watts described Mr Watts as a "lovely, protective big brother" to Becky.
"She was just perfect. Feisty, funny, she would make a good situation out of anything bad," Mr Watts said.
"She would always make you laugh."
A jury of 10 women and one man took just three hours and 27 minutes to reject lies by Matthews and Hoare during their trial.
Pornography found on a laptop and phones owned by Matthews and Hoare revealed a shared sexual interest in teenagers and threesomes.
Sinister Facebook messages in which the couple discussed kidnapping schoolgirls for sex revealed the motive behind Becky's death, the judge said.
Matthews and Hoare told family members and police they had heard Becky leave at 11.15am on the morning of February 19.
And as public searches and a huge police investigation gathered pace, the pair sat with Becky's father and stepmother in the home where she had died.
Hoare texted Matthews "lol" as he began dismembering Becky's body, while she sat with Mrs Galsworthy discussing when to report Becky missing.
"Their deceit of the family was particularly cruel and unusual and the family's sense of betrayal by Nathan Matthews and Shauna Hoare is both understandable and justified," the judge said.
At the end of his sentencing remarks, Mr Justice Dingemans welled up, paused and his voice broke as he paid tribute to Becky's family, who wore blue ribbons in her memory.
"Hearing the evidence during the trial has been difficult for anyone but it is plain that it has been an immense burden for the family," he told them before rushing from court room two.
In the victim impact statements read to the court, Mr Galsworthy and Ms Watts described their devastation at Becky's murder.
Ms Watts spoke of seeing her daughter with bandages wrapped around her body to hide where she had been dismembered.
"Those people who were involved in Becky's murder, dismemberment and concealment have left us with a lifetime of emptiness, continuing nightmares of her final moments and a grave to visit," she said.
Karl Demetrius, 30, and Jaydene Parsons, 23, who admitted assisting Matthews to hide Becky's body parts in their shed, will be sentenced in February.