For the good love of card spirits... As a (former) fan of detective stories (remind me to finish Agatha Christie's "The ABC Murder"), it's both jaw-dropping (in a negative way) and a concerning situation down there. In Australia, no less. One would typically hear Australia to be housing spawns of spiders and creatures that probably shouldn't ever exist— but murder sure is new to my ears (because there's basically the good old England for that according to stereotypes, unless you're a fan of Detective Conan, which I'm rather a fan of something similar to it, The Kindaichi Case Files)
Nevertheless, yes. The outrage on women being killed, especially by their exes should be put to an end. Investigations can go as far as resolving it and providing justice (hopefully as it deserves). Self-defense, however, can most likely prevent or mitigate it. But well, the most important thing is to stay vigilant. Some detective stories already had given us the warning signs— might as well avoid death flags.
Regardless, stay safe there.
We don't have a good record for treatment of woman in Australia. There's a lot of domestic violence. We aren't all beautiful beaches and kangaroos sadly...