NEWS.com.au | Ashlee Polkinghorne pleads guilty over 4yo daughter Chloe Valentine's ... ABC Online A woman due to go on trial for the manslaughter of her four-year-old daughter in a backyard motorbike crash has changed her plea to guilty. Chloe Valentine died in January 2012 after she was put on a motorcycle in a backyard at Ingle Farm in Adelaide. SA mum admits daughter's killing |