THIS is the jealous killer sentenced to at least 25 years behind bars for knifing a mum-of-three through the heart.
Mark Hatter, aged 44, stabbed 31-year-old Dawn Backhouse at her home on Langsett Grove, Walkley, while shouting ‘die, die’.
Two of Dawn’s children - girls aged 10 and three - were asleep upstairs when their mum was attacked.
Jurors at Sheffield Crown Court were told that Hatter, of Hammerton Road, Hillsborough, killed his ex-partner Dawn to stop her leaving Sheffield to be with another man in her home town of Maidstone, Kent.
In a bid to cover his tracks he told detectives that Dawn had stabbed herself while trying to self-harm.
But a neighbour heard the commotion during the stabbing.