The last moments of one of John Lowe's murder victims were played to the jury during his trial. Lucy Lee told operators that Lowe had shot her mother and that she didn't know if she would survive going to look for her.
Surrey Police also released aerial footage from the helicopter used in the search after the shooting was reported.
Our reporter Kate Bunkall has been in court today and has been looking at case.
Her report contains recordings some people may find distressing.