A mum and her new boyfriend have been convicted of murdering her two-year-old daughter, who was sexually abused before she suffered a catastrophic head injury. Isabelle Welsh suffered 21 broken bones in the weeks before she collapsed at her home last September. But a jury at Teesside Crown Court convicted them of murder on Tuesday (July 28). Harrison Simpson (Image: Cleveland Police)A post mortem revealed the extent of her injuries - her skull was fractured, her brain damaged and she had been sexually assaulted. During her short relationship with Simpson, Walker voiced concerns that he might be a paedophile.