May I tell you a very different thought which I had some times ago already. I posted that on another thread but had no encouragement. I will use only initials and maybe, you will google it (I'm sure you will find it quick).
5.4.2015 Murder in Leeton, female teacher St. S., 26yo
6.4.2015 Twin brother M. St. (24yo) in Forreston, farm Adelaide Hills, gets a call from his identical twin brother V. St. in Leeton
8.4.2015 V. St. (24yo), male school cleaner, is arrested in Leeton, charged for murder of teacher
13.4.2015 Suitcase man (elderly about 60yo) in Wynarka is seen
31.4.2015 Until this day twin brother M. St. of Forreston helps his brother V. St. to cover up the murder (charged later)
26.5.2015 Suitcase man (elderly about 60yo) in Wynarka is seen the second time
10.6.2015 Identical twin brother M. St., Forreston, is arrested, charged as an accomplice to his twin V. St. in Leeton
Unfortunately I'm short with time this morning and tell only briefly.
V. St., Leeton, came 2014 from the Netherlands with mother and another brother (not the twin), was born in Tasmania and lived in NL until 2014.
He is authistic and one can't assume, that he managed the murder and the cover up alone without help.
On WS we had discussed whether the murder of the teacher could be V. St.'s first murder or not. We had discussed also whether his identical twin had something to do with the murder and perhaps with an earlier murder, maybe in the Netherlands already.
Both brothers have a father, maybe elderly around 60yo, who is also living somewhere in Australia. He didn't appear in any news until now. The mother of the twins and a brother of the twins, both living in Leeton as the murderer V. St., were mentioned in the news (they helped police) and were pictured. No picture at all of the father of the twins (initials St. St.) and no interview - that's unusual.
My thought: M. St. of Forreston maybe drove to his twin V. St. to help the authistic with the cover up. Route Adelaide Hills to Leeton, possibly through Wynarka. There was a murder of a little girl before, done by him or his twin, in the Netherlands or in Australia, the remains were in Forreston in a suitcase. After the murder of the teacher in Leeton M. St. had to get rid of these remains asap because he had to fear a police search of his home. He drove to Leeton in a hurry and droped the suitcase on his way near Wynarka. He arrived perhaps 6.4. in Leeton and helped his authistic twin with the cover up.
After this maybe the unknown father of the twins (could be 60yo) helped somehow his twin sons to cover up the twin conspiracy. Maybe he searched the dumped suitcase to hide it better than before. The suitcase which M. St. from Forreston had dumped on his way from Forreston to Leeton.
I hope, you are able to understand, what I try to explain?
For me, it makes sense. The question "Had there ever been another murder before the murder of teacher St. S.?" would clarify. Perp: one of the identical twins. The question "Who is the suitcase man and why doesn't he call police?" would clarify. He is the father and helped the twins to cover up. The question "Who, when, where, who helped whom?" would clarify in the Leeton murder and also in the Wynarka murder. The question "Who is the little girl?" would perhaps clarify. She maybe an unregistered child out of the area Adelaide Hills/Forreston/a farm there.
I'm going to my holidays now and I will answer any question, when/if I will have access to the Internet again.
Please google the story, you will find enough.
P.S.: Could be a reason, why we don't see a phantom pic of the elderly suitcase man (if police is on the trace already).
Btw: M. St. of Forreston came earlier than his twin from the Netherlands and settled near Adelaide. Authistic twin V. St. came with mother and brother L. St. later and they settled at Leeton. The separated father of all 3 boys came before his ex-family from the NL to Australia.