A COLLECTION OF SOME OF THE MOST PSYCHOTIC AND DANGEROUS WOMEN IN MODERN TIMES Catherine and her partner, David John Birnie were famously known throughout Australia as: The Killer Couple. They were from Perth, Australia and were found to have murdered four women ranging in age from 15 to 31 years old, over a span of about five weeks. Their fifth victim managed to escape through the bedroom window, while Catherine was distracted by a knock at the front door. The woman immediately ran and found help. The press referred to the heinous murders as the Moorhouse Murders. The victims were taken to Catherine and David's home located at 3 Moorhouse Street in Willagee, in Western Australia, a suburb of Perth.