Experts say police response to domestic violence complaints needs to evolve abc.net.au - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from abc.net.au Daily Mail and Mail on Sunday newspapers.
Mark Bombara killed Jenny Petelczyc, the friend of his ex-wife, and her 18-year-old daughter Gretl Petelczyc in their Floreat home, before taking his own life.