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New True Crime Documentary Tells Shocking Story Of Serial Killer Joanna Dennehy

New True Crime Documentary Tells Shocking Story Of Serial Killer Joanna Dennehy

Sadistic serial killer Joanna Dennehy is put under the spotlight in a brand new true crime documentary, looking back on the Peterborough Ditch Murders 12 years after they took place.

The first episode of The Killer In My Family, which will air on Quest Red tonight at 10pm, delves into "unpredictable" Joanna, her controlling ways and her brutal murder spree.

For those unfamiliar with her case, in March 2013, mum-of-two Joanna, 36, callously stabbed two men to death within 10 days of each other, dumping their bodies in ditches around Peterborough, Cambridgeshire.

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By the time the police finally caught up with her, Joanna had continued her violent rampage, going on to randomly attack two unsuspecting dog walkers before finally being taken into custody.

Joanna Dennehy is now serving a life sentence (Credit: Quest Red)
Joanna Dennehy is now serving a life sentence (Credit: Quest Red)

She's reportedly wanted to take her number of victims up to nine, to match killers Bonnie and Clyde.

In the new documentary, Joanna's story will be told by those who knew her best, like the father of her two children, John Treanor.

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Joanna and John met in St Albans in 1998 when she was walking her dog aged just 15. The pair went on to have their first child two years later.

They then had an on-off relationship for 12 years, but John said that Joanna was "abusive" throughout.

Joanna and John had an on-off relationship for 12 years (Credit: Quest Red)
Joanna and John had an on-off relationship for 12 years (Credit: Quest Red)

Her relationship with their kids wasn't healthy either, he recalls in the new interview. She'd often take them to the dykes in Peterborough, where she would later dump her first three victims, and the way she played with them showed sparks of her evil nature.

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"Her idea of playing with my eldest daughter was throwing stones at cars," he says on the programme. "It wasn't a normal mother-daughter relationship."

Revealing harrowing new details of their relationship, like how she would intimidate other mothers on the school run, he adds: "She was threatening female friends of mine up the school.

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"I was even pulled in with a social worker, headteacher, and my daughter's teacher who basically said she can't come up to the school anymore because she was threatening people that I was talking to.

"She liked to control me in so many different ways."

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Joanna Dennehy split with Joanna after she told him she wanted to commit murder (Credit: Quest Red)
Joanna Dennehy split with Joanna after she told him she wanted to commit murder (Credit: Quest Red)
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The pair's relationship came to an end for good in 2009, when Joanna came home drunk and pulled a dagger out from the inside of her boot, bellowing: "I wish I could kill someone," as she stabbed the blade into the floor.

He admits in the documentary that it came as no surprise to him, then, when he received a text from her sister four years later revealing she'd been arrested for murder.

As well as offering an insight into her home life, the documentary also shows Joanna's unusually calm and un-remorseful behaviour when taken in by police.

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Forensic Criminologist Dr. Jane Monckton Smith adds that Joanna revelled in the attention she was receiving following her arrest.

"This person is not anxious or concerned or remorseful that she's been arrested," she says. "She was almost, I would say, enjoying it. She was flirting with the officers, she was smiling, she was leaning across the desk in a very familiar way."

Joanna showed no guilt as she arrived in prison (Credit: Quest Red)
Joanna showed no guilt as she arrived in prison (Credit: Quest Red)

The programme also speaks to Joanna's defence attorney, among others, all of whom describe her lack of empathy in chilling detail.

The murderess was given a full-life sentence for the savage murders of Lukasz Slaboszewski, John Chapman and Kevin Lee in March 2013.

She'd stabbed 31-year-old Lucas in the heart before targeting 56-year-old John Chapman a week later.

On the same day, she brutally killed her landlord and lover Kevin Lee too. Disturbingly, he was found dressed in a black sequin dress with stab wounds to the neck and chest.

This sounds like it's going to be so dark.

The new series of The Killer In My Family premieres at 10pm Thursday 14th November exclusively on Quest Red.

Featured Image Credit: Quest Red

Topics: True Crime, TV News, TV Entertainment

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Joanna Freedman

Joanna is a journalist at Tyla with a particular interest in highlighting women's issues and telling inspiring first person stories. She's also their resident foodie, and loves covering exciting new beauty launches, too. Contact her at [email protected]