They murdered four women ranging in age from 15 to 35 in their home in the 1980s, and attempted to murder a fifth. Due for another parole review this year, Catherine Birnies hopes were dashed in October 2018 when the WA Attorney-General introduced a new law into parliament.
Tanya, who has changed her surname since Birnie's capture, has never married and had no children, stating, "I don't wanna spawn another David Birnie".[2].