It was Wednesday the 2nd of August 1989. 41-year-old Marguerite Edwards started the day like any other. Making sure her three daughters were up, and ready for school. Marguerite was happily married to Iain Edwards, a successful orthodontist with a surgery in Bondi. They lived in a two-storey house on Victoria Road, Woollahra in Sydney’s Eastern suburbs. After getting her daughters organised, Marguerite dropped them at Ascham school, in the nearby suburb of Edgecliffe. She then made her way to an aerobics class, before doing some shopping at Bondi. She returned to her Woollahra home sometime after midday. Later that afternoon, Marguerite's three daughters were waiting. School had finished, and they were wondering where mum was…