Serial killer’s daughter considered suicide in fear of turning into her mum

Dennehy and her daughter
Joanna Dennehy’s daughter, Shianne Treanor, told how she considered suicide after learning of her mum’s appalling crimes (Picture: Mirrorpix)

The daughter of one of Britain’s most dangerous female serial killers reportedly considered suicide over fears she would turn into her mum.

Triple murderer Joanna Dennehy, 37, became only the third woman in the UK to receive a whole life term, after Rose West and Moors murderer Myra Hindley, meaning she will never be freed.

She confessed how murder was ‘more-ish’ after stabbing three victims to death in a vicious rampage in 2013 which left two others seriously wounded.

Dennehy laughed in the dock when she was jailed at the Old Bailey in 2014 – as a judge branded her a ‘cruel, calculating, selfish and manipulative serial killer’.

Now her daughter, Shianne Treanor, 21, has revealed how she considered ending it all after being told about her mother’s appalling crimes.

Shianne told how her mental health nosedived when she learned the horrific truth about her mum aged 13 – triggering issues including self-harming, anxiety and depression.

‘I lost all my senses and fell to the floor crying. The first thing I said was, “Will I turn into her? Will that be me?”

‘I thought because I was going to turn into her, “Maybe I should end it now, get it over and done with, so I don’t hurt anybody,’ she told The Sun.

Baby Shianne Treanor with serial killer mum Joanna Dennehy and also her dad John Treanor in 1999.
Baby Shianne Treanor with serial killer mum Joanna Dennehy and dad John Treanor in 1999 (Picture: Mirrorpix)
Joanne Dennehy booking mugshot from Cambridgeshire Police
Dennehy claimed she found murder ‘moreish’ (Picture: Cambridgeshire Police)
Dennehy was handed a whole life term - meaning she will never be freed - in 2014
Dennehy was handed a whole life term – meaning she will never be freed – in 2014 (Picture: SWNS.com)

Breaking her silence for the first time in 2019, Shianne, then 19, told how mum should spend the rest of her life behind bars.

‘She deserves to spend the rest of her life in prison. She’s hurt those people and I can’t ever forgive her for that.

‘She should spend the rest of her life in jail thinking about the misery she’s caused,’ Shianne said.

Dennehy pleaded guilty to the murders of Lukasz Slaboszewski, 31, Kevin Lee, 48, and John Chapman, 56, in and around Peterborough in March 2013, dumping their bodies in ditches.

She also tried to kill two dog walkers but they survived.

Shianne is set to reveal her anguish in a Sky documentary, The Murderer and Me, due to air tomorrow.



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