The Birnies were not united in a wedding ceremony, but they were a
common law married couple. According to her therapist he controlled her and she was
an unwilling accomplice in the murders, mutilations and rapes. In this chapter the two
killers were described in detail, as was their relationship. Their other crimes were
discussed, and the killings themselves were analyzed in terms of MO, motive, time
frame, victims, victimology and number of victims. Significant serial killer
communication was discovered and explained, and the investigation and trial discussed.
Keywords: Abduction, Australia, Catherine Birnie, David Birnie, Common law
marriage, Domestic help, Glen Eagle National Park, House of horrors, Karnet
Prison, Love nest, Natural born killer, Perth, Perth Police Court, Pinnaroo
Cemetery, Serial killer couples, Sodomy, Squalor, Torture chamber, Victoria
Park, Waverly Drive-In Theater.
