Summary: Alexandra Walker, 25, and her partner Harrison Simpson, 22, have been convicted of murdering Walker's two-year-old daughter, Isabelle Welsh. Simpson was also found guilty of sexually abusing the child; Walker was acquitted of sexual assault but convicted of murder and child cruelty. Isabelle sustained catastrophic injuries, including a fractured skull and 21 broken bones, and died after collapsing at the Thornaby home on 13 September 2025. Both will receive life sentences, with minimum terms to be set at an upcoming hearing.
Mother and Partner Convicted of Murdering Two-Year-Old Isabelle Welsh After Sustained Abuse
Isabelle Welsh was physically and sexually abused before her death, a jury heard [Supplied]
Warning: This story contains distressing details.
A Teesside Crown Court jury has found 25-year-old Alexandra Walker and her 22-year-old partner, Harrison Simpson, guilty of the murder of Walker's two-year-old daughter, Isabelle Welsh. Simpson was also unanimously convicted of sexually abusing the child. The verdicts follow evidence that Isabelle suffered repeated injuries in the weeks before she collapsed with a fractured skull at the family home in Thornaby on 13 September 2025 and died the following day.
What the Court Heard
Prosecutors told the jury the abuse began shortly after Simpson entered Walker's life in June 2025 and described a sustained pattern of violence and sexual abuse. Medical examinations recorded a fractured skull, catastrophic brain injury, multiple bruises and 21 broken bones sustained in the weeks leading up to Isabelle's collapse.
Footage of Isabelle from June 2025 showed she was a "happy and healthy" child before Harrison Simpson came into her life, prosecutors said [Cleveland Police]
Court evidence included medical reports, CCTV footage and phone records. Prosecutors said the scale and pattern of injuries made clear that only the two adults who were regularly with Isabelle could have inflicted them. Both defendants denied the allegations: Simpson said he had no motive to harm Isabelle, while Walker denied hurting her daughter and claimed she was unaware of any abuse.
Verdict And Sentencing
Jurors reached their decisions after about six and a half hours of deliberation. Simpson was found unanimously guilty of murder, child cruelty and sexual assault of a child. Walker was convicted of murder by a majority verdict (11–1) and unanimously convicted of child cruelty; she was acquitted of sexually assaulting her daughter.
Ms Justice Norton told the court both defendants would receive life sentences. She will set the minimum terms they must serve before being eligible to apply for parole at a sentencing hearing scheduled for Thursday.
Alexandra Walker and Harrison Simpson will be sentenced on Thursday [Cleveland Police]
Family And Official Reactions
In a statement, Isabelle's family said:
"Isabelle should have had her whole life ahead of her, but she was taken from us in the most heartbreaking way. She was so loved and our lives will never be the same without her. While today's verdicts cannot undo the pain caused or bring Isabelle back, it does mean justice has been served. We will remember Isabelle forever."
Detective Chief Inspector Steve Chatterton described Isabelle's injuries as "catastrophic" and said they were inflicted by "the very people who should have loved, cared for and protected her." District crown prosecutor Kirstie Devine said the child had suffered "shocking violence" and "appalling abuse," and that the weight of evidence showed the two adults regularly with Isabelle were responsible.
This case has highlighted the role of family, community and statutory agencies in identifying and responding to child harm. The full sentencing hearing will determine the minimum custodial terms for both defendants.
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