A WOMAN who stabbed a teenager to death in a South Yorkshire park on Valentine’s Day had warned she was going to ‘get anyone who crossed her,’ a court heard.
Hannah Bonser, aged 26, stabbed Casey Kearney, 13, once in the abdomen with a 16cm blade as the two walked past one another in Elmfield Park, Doncaster.
Casey, on her way to stay at a friend’s house, managed to phone 999 from her mobile and say she’d been stabbed.
She died in hospital after suffering damage to a major artery which caused ‘rapid and catastrophic blood loss’.
Prosecutor Graham Reeds QC told Sheffield Crown Court that, three days beforehand, Bonser told a friend she was going to kill her ex-boyfriend because he made her have an abortion years ago - and threatened to ‘get anyone else who crossed her.’
Bonser claims to have no memory of stabbing Casey. She refused to answer police questions after attacking 13-year-old Casey in Elmfield Park, Bennetthorpe - and now says she has no recollection of the day, Sheffield Crown Court was told.
Prosecutor Graham Reeds QC said: “It cannot be known why Hannah Bonser went to the park that afternoon.
“She later declined to answer police questions, and she now claims to have no memory of what she did.”
Mr Reeds said Casey, from Rossington, had missed her bus stop on the day she was killed so got off and walked through the park.
He said Bonser, of St James Street, Doncaster, who had bought two kitchen knives from Boyes Store on Duke Street earlier in the day, stabbed Casey without warning at around 1.15pm.
“As they approached each other, the defendant pulled out the larger of her two knives,” he said.
“As she came alongside Casey, the defendant stabbed her once in the abdomen, causing such severe internal injuries that Casey later died.
“The attack was sudden and caught Casey completely unaware. There was no argument, no shouting, there was no warning that anything was about to happen.”
Mr Reeds said two 10-year-olds in a nearby playground heard no screams and saw no signs of any struggle.
After the attack, Bonser carried on walking and left the park, the court heard.
She then made her way to Rethink, a service for people with mental health problems, where she told a worker she had killed someone.
Mr Reeds said: “She said she had stabbed someone in Elmfield Park. She also said she had been poorly for a long time.”
The jury heard damage to the inside of Bonser’s coat indicated she had hidden the weapon up her sleeve.
A police search of her home revealed cut marks in one of the doors which raised questions about whether Bonser had practised inflicting a stab wound, Mr Reeds added.
A friend to whom Bonser said she was going to ‘get anyone who crossed her’ said her behaviour had been ‘odd’ since the beginning of summer 2011, Mr Reeds said.
He said Bonser had been admitted to a psychiatric hospital in October 2011.
Passer-by Kerry Ann Berry held back tears as she described finding Casey in the park and stroking her face while another member of the public rang for an ambulance.
Casey’s relatives wept silently in the public gallery.
Bonser, who was dressed in grey tracksuit bottoms and a light blue T-shirt, denies murder.
The trial continues.