Roberts shot Use_firearm dead Temporary Detective Constable David Wombwell and Detective Sergeant Christopher Head , whilst John Duddy , another occupant in the vehicle , shot Use_firearm dead Police Constable Geoffrey Fox .

Roberts shot Use_firearm dead Temporary Detective Constable David Wombwell and Detective Sergeant Christopher Head , whilst John Duddy , another occupant in the vehicle , shot Use_firearm dead Police Constable Geoffrey Fox .

They began Process_start with the murders Killing of Benito Constable William Wainwright and RCMP Constable John Shaw near Pelly , Saskatchewan by three Doukhobor men who had been in the custody of the officers .

They began Process_start with the murders Killing of Benito Constable William Wainwright and RCMP Constable John Shaw near Pelly , Saskatchewan by three Doukhobor men who had been in the custody of the officers .