David and Catherine Birnie victims. They chained her to a bed, gagged her and repeatedly raped her, but Catherine was feeling insecure because she knew that David actually liked Ms Patterson as a person. Catherine Birnie told police she was prepared to follow him to the end of the earth and do anything to see that his desires were satisfied. The Birnies forced sleeping pills down Susannahs throat. These crimes were referred to in the press as the Moorhouse murders, after the Birnies' address at 3 Moorhouse Street in Willagee, a suburb .