In a heart-wrenching case that has left the nation in disbelief, shocking CCTV footage from inside a Thornaby home has been officially released, showing the unimaginable cruelty inflicted on a tiny two-year-old girl. Isabelle Welsh, described by her family as a “happy and mischievous” little princess, was subjected to a savage campaign of physical and sexual abuse by her own mother and her new boyfriend. The forensic examination revealed she had sustained 21 fractured bones before collapsing in agony at her home in Hartington Close, Thornaby, on 13 September 2025.

The child was rushed to hospital by ambulance but could not be saved. She died the following morning from severe traumatic brain injuries that were medically untreatable and had been inflicted within the last 24 hours. After watching the disturbing CCTV footage, viewers across the country were left stunned – the evidence proved beyond any doubt that Isabelle was tortured by those who were supposed to protect her.

The heart-breaking timeline that emerged in court:

• Isabelle was a thriving, healthy toddler until her mother Alexandra Walker (now 26) met Harrison Simpson (22) in the summer of 2025.
• Simpson moved into the family home and quickly became the child’s sole caregiver for hours at a time.
• Walker herself had concerns that Simpson was a sex offender and even searched the national sex offenders’ register – yet she continued to leave Isabelle alone with him.
• On 2 September, Isabelle was taken to hospital after a spiral fracture to her leg; doctors flagged serious safeguarding concerns, but Walker delayed everything.
• On 13 September, Simpson was left in sole charge of the two-year-old. Hours later, Walker found Isabelle collapsed at the foot of the stairs. She did not call 999 for hours. Instead, she smoked cigarettes, repeatedly googled “why would my toddler be bleeding?”, and on CCTV can be heard calling her daughter’s name and saying “you’re scaring me” as the child lay dying.
• Paramedics found Isabelle with no pulse. She was shaken violently, her head slammed against a hard surface, and she suffered a catastrophic skull fracture and brain bleed. The fatal injuries occurred in the final hours of her life.

Post-mortem findings that stunned the nation:

• 21 broken bones in total – including legs, arms, spine, ribs, and skull.
• 97 soft-tissue injuries and bruises across her entire body.
• Clear evidence of repeated sexual abuse and forceful gripping.
• A “campaign of violence” that no one – not even the people meant to care for her – could have prevented.

After the verdict (28 July 2026):

At Teesside Crown Court, Alexandra Walker and Harrison Simpson were found guilty of murder and child cruelty. Simpson was also convicted of sexually abusing the toddler. They were both handed life imprisonment:

• Harrison Simpson: minimum term of 28 years and 6 months
• Alexandra Walker: minimum term of 22 years

Ms Justice Norton described the abuse as “sadistic” and “the most heartbreaking case” the court had seen. Isabelle had her “whole life ahead of her” – it was taken in the most cruel and savage way possible.

Full updates and latest developments (as of 3 August 2026):

• The couple has been remanded into custody. Simpson was previously on the run after failing to appear for a non-molestation order breach, which allowed him to meet Walker and Isabelle for months without being stopped.
• Cleveland Police admitted they failed to arrest him for 18 months despite a warrant being issued.
• The family of Isabelle has released a statement: “Our little girl is gone, but her memory will live on. Justice has been served – though it will never bring her back.”
• Calls are growing louder for immediate reform of child-protection rules, especially when new boyfriends enter a home.
• No appeals have been lodged, and both sentences stand with no possibility of parole.

The shocking CCTV footage and medical evidence have left no room for doubt: Isabelle Welsh was murdered by the very people who loved her. Her name will never be forgotten, and her story will continue to shock and inspire a nation that refuses to look away from child cruelty. Preston Davey had his justice; now it is time to ensure no other little Isabelle Welsh is left without it.