- Isabelle Welsh was murdered in September 2025.
- A mum and her new boyfriend have been jailed for life for the "sadistic" abuse and murder of her two-year-old daughter.
- Alexandra Walker and Harrison Simpson were convicted of murder and child cruelty this week following a trial at Teesside Crown Court.
- Ms Justice Norton jailed the pair for life with minimum terms of 28 years and six months for Simpson and 22 years for Walker.
- Isabelle Welsh suffered from weeks of abuse, including suffering 21 broken bones, before she collapsed at her home in Thornaby, Teesside.
- The judge stated that Isabelle had either hit her head against a hard surface when she was violently shaken, or her killer swung or flung her by the legs into a wall or piece of furniture.
- The couple delayed getting medical help for Isabelle as long as they could, and when she did take her, Walker lied repeatedly to clinicians, the court heard.
- Norton said Walker had looked after Isabelle "appropriately" before June 2025, telling her: "In your own way I'm sure you loved her, but you were more interested in yourself and your needs than you were in Isabelle's."
- Harrison Simpson was also convicted of sexually assaulting Isabelle, while her mother was cleared of that charge.
- Ms Justice Norton stated that the murder was the final act in a series of assaults which the pair tried to cover up.
A mother and her boyfriend have been sentenced to life in prison for the murder of her two-year-old daughter, Isabelle Welsh, who endured horrific abuse.15
Isabelle suffered 21 broken bones and was subjected to weeks of mistreatment before her tragic death in September 2025.
The couple, Alexandra Walker, 26, and Harrison Simpson, 22, were found guilty of murder and child cruelty at Teesside Crown Court.39
The judge, Ms Justice Norton, stated that the murder was the culmination of a series of assaults that the pair attempted to conceal.

Evidence revealed that Isabelle had either hit her head against a hard surface or was violently shaken, with the judge noting that her killer may have swung or flung her into a wall or furniture.
The couple delayed seeking medical assistance for Isabelle, and when they finally did, Walker lied to clinicians about the circumstances surrounding her injuries.
Norton remarked that while Walker had cared for Isabelle “appropriately” before June 2025, she was ultimately more focused on her own needs than those of her daughter.
Simpson was sentenced to a minimum of 28 years and six months, while Walker received a minimum of 22 years, both minus time served on remand.4
“Isabelle Welsh endured weeks of abuse before her death, with evidence showing she suffered from 21 broken bones. The judge noted that the couple delayed seeking medical help and attempted to cover up their actions, leading to their convictions for murder and child cruelty.”
