Whoever threw that suitcase right there on the shoulder of the road bought everyone undone. Everyone. Instantly. Without that, Karlie's body may never ever have been identified until way in to the future with the help of as yet undiscovered science. The collective outrage of the bones of a small child seemed to send the SA police into a solid unyielding frenzy of application and diligence which must have been foreseen by the Discarder of the Suitcase. No way was this going to sink into a mystery like 'Angel's' remains in Belanglo seemed to do.
And it is more than rational to understand that from Holdom's point of view, the Discarder has dug everyone into a hole. Up until then, it is fair to say that matters were gradually fading into the past, the mystery skeleton in the forest, the memories of banks, and Centrelink, the link between electronic transactions , those days when travelling north on the Sturt Highway was a bit of a lark, all these things were inexorably moving back into the mists of time, and the mists of peoples memories, and a man going about his business in Canberra, or going about other sort of enforced business in Cessnock prison could just amble about , unattached to any of that old mess.
So he would have a lot of justified ( in his eyes ) fury at this person, one would think. Enough to be perhaps a bit scary if his holding by the police isn't secure, or hopefully , long term. And , he cant contact her, and she cant contact him, so both are flying blind in a sense during all their interviews, wherein, I gather he isn't saying much, and she is probably saying too much nonsense so far.
It will all unravel. Maybe slowly, maybe suddenly rapidly. But it will.