A man who murdered the teenage girl who called him her father, after she claimed he had sexually abused her 'over a number of years', has been sentenced to life in prison and must serve 32 years before he can be considered for release.
Scott Walker, 51, has not told police the location of 17-year-old Bernadette Walker's body, which has not been found despite searches, and it is not known how she was killed.
Judge Mrs Justice McGowan, sentencing at Cambridge Crown Court, said Scott Walker's refusal to tell police where Bernadette's body is 'means she can't be shown the respect she deserves'.
'Cruellest of all it's likely to mean some members of her family and friends will go on hoping she might be alive and might someday come back into their lives,' she said.
Bernadette's mother Sarah Walker, 38, was earlier convicted of perverting the course of justice after sending fake messages from daughter's phone and sentenced to six years in prison.
Photography student Bernadette was last seen alive on July 18 last year when Scott Walker, who was not her biological father, collected her from his parents' house in Peterborough.
Scott Walker, 51, was jailed for at least 32 years for the murder of 17-year-old Bernadette who called him dad after she told him and her mother Sarah, 38, he had sexually abused her. Pictured: Scott and Sarah
Walker has not told police the location of Bernadette's body, which has not been found despite searches, and it is not known how she was killed. Pictured: Bernadette Walker
Prosecutors said that Scott Walker killed Bernadette to 'prevent her pursuing her allegations of sexual abuse any further'.
She had written in a diary entry: 'Told my mum about my dad and the abuse. She called me a liar and threatened to kill me if I told the police.'
Scott Walker said that Bernadette ran away from his car when he stopped the vehicle, but jurors at Cambridge Crown Court rejected his account, convicting him at an earlier trial of murder.
Lisa Wilding QC, prosecuting, said that Scott Walker formed an 'unholy alliance' with Bernadette's mother, his ex-partner Sarah Walker, to cover up the girl's death, sending messages from Bernadette's phone to give the impression she was still alive.
Sarah Walker, 38, was convicted of perverting the course of justice and sentenced to six years in prison.
The judge said she was 'sure Sarah Walker was the guiding mind behind the detail of (the) plan' to cover up Bernadette's death, adding: 'Each defendant was a willing party in that enterprise.'
The prosecution said Bernadette had told her mother on July 16 that Scott Walker had sexually abused her 'over a number of years', but that Sarah Walker did not believe her daughter's allegations.
Scott Walker told jurors that Bernadette's allegations of sexual abuse were 'untrue'.
Bernadette Walker, 17, (left) of Peterborough, Cambridgeshire, pictured with her mother Sarah Walker (right)
The prosecution said that Bernadette was sent to stay with Scott Walker's parents overnight on July 17 'while things calmed down a little', with Scott Walker collecting her on July 18, when she was last seen alive.
Ms Wilding said that Scott Walker's phone, 'which was usually in regular use', was off between 11.23am and 12.54pm on July 18.
'The prosecution say that in that hour-and-a-half he killed Bea,' she said.
Ms Wilding said that when Scott Walker's phone reconnected to the network at 12.54pm, the first call he made was to Sarah Walker, which lasted for more than nine minutes.
The prosecution suggested the pair 'concocted' a story during this call to cover up Bernadette's disappearance and death.
Scott Walker told jurors that Bernadette's allegations of sexual abuse were 'untrue'
Sarah Walker reported Bernadette as missing to police in the early hours of July 21.
Sarah Walker was not married to Scott Walker but had changed her surname to Walker by deed poll.
At the time of Bernadette's disappearance, Scott and Sarah Walker were living at the same address but Sarah Walker was in a relationship with another man.
Sarah Walker was found guilty of two counts of perverting the course of justice 'knowing or believing' Bernadette to be dead, having already admitted two counts of perverting the course of justice.
These were by sending messages from Bernadette's phone after she disappeared and by providing false information to the police relating to her disappearance.
Scott Walker was found guilty of murder and of two counts of perverting the course of justice.
They were sentenced at Cambridge Crown Court on Friday and remained silent as they were led to the cells.
Previous reports claimed Sarah's family are 'sticking by her' believing she was manipulated by Scott.
In July, Bernadette's grandmother Pat Dickinson said her 'horrible' killer 'deserves to rot in hell' and must reveal the location of her body.
She described the year since Bernadette as like being in a coma and declared: 'We need to have closure and Bernadette must rest in peace.'
Bernadette pictured with her father Scott Walker who murdered her
Bernadette was just a toddler when Scott entered her life in 2006 after he started an affair with her mother, Sarah, then a pregnant single mother of five.
A decade and a half – and four more children – later, their volatile, toxic relationship would implode.
Pat said: 'I can't believe he killed my beautiful granddaughter but he's been found guilty. Now he must tell us where he has hidden her body so we can give her a decent burial'.
She told The Sun: 'I feel like I've been in a coma for a year and just woken up to this dreadful news.
'I feel like I have two angels on each shoulder, one saying Bernadette's out there waiting to be found and the other saying she's not.
'But she's not the type of girl to run away. Deep down we know she's not alive but we just want to know where she is to bring her home. He is the only person who knows where she is.'
Bernadette's 38-year-old mother Sarah, who changed her surname and those of all her children to Walker's by deed poll, stood trial alongside her partner at Cambridge Crown Court and was found guilty of perverting the course of justice, while 'believing' or 'knowing' her daughter was dead.
After Bernadette's murder, she and Walker hacked into her social media accounts and phone, posting fake messages to make it seem she had run away.
Walker's estranged wife Jill, to whom he is still legally married, spoke to the Mail about the terrifying, evil man who tore apart her own life before moving on to Bernadette's mother.
She claims that 'highly-sexed' Walker regularly forced her to have sex, verbally abused her and threatened to kill her before she fled.
Jill also revealed that before moving away from Yorkshire to Walker's home town of Peterborough, Bernadette's mother contacted her, concerned about his behaviour and asked 'whether he would hurt her children'.
'Maybe I could have saved Bernadette,' said 51-year-old Jill, an NHS support worker.
'I have immense feelings of guilt about being able to save her if I'd warned Sarah more. I told Sarah not to move. I told her that he would alienate her from her friends and family and taking her away would make this worse.
'Knowing he has murdered Bernadette has shaken my world to the core. How can you process the fact that somebody you are legally married to has killed a child?'
Before Bernadette's death, life at the family's five-bedroom council house in Peterborough had become highly chaotic.
Sarah had given birth to her tenth child just a few weeks earlier. But she was also planning to leave Walker – father of four of her children as well as two others from previous relationships – for a new lover.
Walker was infuriated by her infidelity and the prospect of his family being broken apart.
In the midst of what was already a toxic,
