Karen MacKenzie and her three children were murdered in their Western Australian home in 1993.
Bob and June Meredith were living a simple but idyllic life with their teenage children in Albury in 1996, until a chance encounter with a stranger tore it apart.
Dubbed the “Vampire Killer”, Queensland woman Tracey Wigginton served 22 years in prison for the murder of 47-year-old Edward Baldock in 1989. Wigginton, then 24, and three other women lured Baldock into a car and took him to a park on the banks of the Brisbane River, where she stabbed him 27 times. In 1991 she pleaded guilty to the murder and the lurid details of the crime shocked the nation.