In September 2016 a car formerly owned by Palmer 's foster father was seized by police and is undergoing forensic examination , and on 20 September four people , including her foster parents , were arrested in connection with her murder .
In September 2016 a car formerly owned by Palmer 's foster father was seized by police and is undergoing forensic examination . 
 On 20 September four people , including her foster parents , were arrested , and her foster father , Rick Thorburn , is to be charged with her murder .