Police knew they were on the front foot from the outset. In early October, 2005, a bureaucratic error meant that paperwork for David Birnies antidepressants was lost in the system and his supply was cut off. These crimes were referred to in the press as the Moorhouse murders, after the Birnies' address at 3 . These crimes were referred to in the press as the Moorhouse murders, after the Birnies' address at 3 Moorhouse Street in Willagee, a suburb of Perth.[1]. The judge remarked: Each of these horrible crimes were premeditated, planned and carried out cruelly and relentlessly over a comparatively short period. In September 1986, David Birnie placed an advertisement in a local paper as a lure to potential victims. [13] The Birnies had given themselves aliases, but Moir had read David's name on a medicine bottle. In 1985, she left her husband and six children and went to live with David.