little chloe valentine , 4 , died of massive head injuries after being forced to ride a motorbike that repeatedly crashed over a three-day period in the backyard of her adelaide home in january 2012 .
her mother , ashlee polkinghorne , and her then partner are in jail after pleading guilty to chloe 's manslaughter through criminal neglect .
in an emotional statement outside the adelaide inquest on thursday , chloe 's grandmother belinda valentine welcomed coroner mark johns ' ruling that families sa was broken and fundamentally flawed that