A police officer has admitted we may "never know the truth" about a missing teenager murdered by her own dad.

Scott Walker, 51, was found guilty on Monday of murdering Bernadette Walker, 17, despite her body never being found.

Bernadette alleged her non-biological father, Scott, sexually abused her which both he and her own mum, Sarah Walker desperately tried covering up.

The tragic teenager who was best known as Bea was last seen alive on July 18 last year but for the next seven weeks, her evil parents pretended she was alive by sending messages from her phone.

Bea's allegations about her father's sexual abuse were passed to the police via a social worker on July 22, leading to his arrest which became a murder enquiry the following day.

Scott Walker, 51, of Peterborough, was convicted of murdering Bea at Cambridge Crown Court where he was also found guilty of two counts of perverting the course of justice.

Additionally, the trial found Sarah Walker guilty of two counts of perverting the course of justice, CambridgeshireLive reports.

Detective Inspector Justine Jenkins, from the Beds, Cambs, and Herts Major Crime Unit, said: "I am pleased we have been able to get justice for Bea after what has been such tragic circumstances.

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"I just hope now we may get the answers we need to be able to find her and lay her to rest. If anyone has any information about this investigation which may help us find Bea, please get in touch.

"We may never know the truth about what Scott did and why, but we do know Bea had made allegations of abuse against him.

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"My plea to anyone who may have been subjected to abuse is to speak to us. Bea thought she could confide in her own mother, who should have been able to protect her, but instead, she met a tragic end."

During the six-week trial, jurors heard Sarah Walker didn't report her daughter missing until July 21.

When he was questioned by police, Scott Walker claimed he had stopped the car on the way back home after picking Bea up from his parents' house to speak about the allegations she had made.

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But when he stopped the car, he said, she got out and ran off in Skaters Way, leaving her rucksack behind.

Police later discovered Scott Walker had not gone straight to collect her that morning.

Instead, he travelled to a lock-up owned by his parents in Walton.

Having disconnected from his network for an hour and a half after he picked Bea up, the first call Scott made once he reconnected was to Sarah, which lasted nine minutes.

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Scott and Sarah visited the lock-up several more times in the 48 hours that followed Bea's disappearance.

They also made a journey to Cowbit, a rural area of Lincolnshire, in the dead of night.

Bea's rucksack was later found in the lock-up and a diary was found inside.

An extract from the diary read: "Told my mum about my dad and the abuse. She called me a liar and threatened to kill me if I told the police. What kind of parent wouldn’t believe their daughter?"

Specially trained officers carried out extensive searches for many weeks, but Bea's whereabouts sadly remain unknown to this day.

DI Jenkins said: "We know Bea was without her mobile phone when she left the family home on 17 July.

"Despite this, a number of messages via text and social media were sent from Bea’s phone, by both Scott and Sarah, to make it look as though she was still alive and not wanting to go home."

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Information about the investigation can be passed on to police either online here or by calling 101.

Scott and Sarah Walker will be sentenced at Cambridge Crown Court at an as-yet unconfirmed date.

If you or somebody you know has been affected by this story, contact Victim Support for free, confidential advice on 0845 30 30 900 or visit their website, www.victimsupport.org.uk.

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