Hannah Bonser stabbed Casey Kearney in a random attack in Elmfield Park, Doncaster, South Yorkshire, on Valentine's Day.
A jury at Sheffield Crown Court rejected Bonser's claim she was guilty of manslaughter due to diminished responsibility.
A WOMAN with a history of mental health problems has been found guilty of murdering a 13-year-old stranger in a park.
Hannah Bonser stabbed Casey Kearney in a random attack in Elmfield Park, Doncaster, South Yorkshire, on Valentine's Day.
A jury at Sheffield Crown Court rejected Bonser's claim she was guilty of manslaughter due to diminished responsibility.
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