A woman is to appear in court on Thursday charged with the murder of a 13-year-old girl who was stabbed in a Doncaster park.
Kearney was found lying in Elmfield Park in Doncaster on Tuesday afternoon. She had managed to call 999 and a passer-by also called emergency services, but the girl died in hospital later that day.
Bonser is charged with Kearney's murder and two counts of possessing a bladed article.
Police have appealed for information from the public as they seek to establish the teenager's movements after she left her home in Rossington, planning to catch a bus into Doncaster town centre to meet a friend.
Detective Superintendent Terry Mann, of South Yorkshire Police, said Kearney's family were devastated.
"They are a loving family. It is a very, very sad case. They are very traumatised by this, as you can imagine," he said.
The Times reported that Bonser was known to social services agencies.
It quoted John Willis, one of the first passers-by to find the dying girl and stop to help, as saying: "We got her in the recovery position. She didn?t move a lot and she didn?t speak. Her breathing was very shallow and she was very pale.
"The police arrived very promptly and took over the situation. I was very upset -- it was very shocking."
Source: AFP European Edition