The following is purely a hypothetical and possibly just stems from my desire to see answers to a few different crimes -
What if Karlie and Khandalyce were driving somewhere remote and the car broke down or crashed and they were forced to hitch-hike. Along comes truck driver AJ.
While driving AJ learns that Karlie is a bit of a nomad, and is estranged from her family.
We know of AJs paedophile tendencies ... so maybe his mind started ticking ... he has a young child and a nomadic mum in his truck. Nobody knows. If he were to get rid of the mum, it could be months for anybody to even realise she is missing (the fact that it was actually years was unexpected luck).
He could have killed Karlie and dumped her in Belanglo, hoping that when her body was eventually found, it might be blamed on Milat.
He then takes the little girl back to the ring.
A couple of months later and the ring start worrying that mother and daughter may be starting to be missed, and the little girl is killed. Maybe she (and suitcase) is buried at the property of one of the members ... on a farm perhaps. I always imagine these rings need at least one person with a farm or somewhere secluded, so that no kids are seen or heard.
All is good ... for a while. Karlies body has been found, but nobody has any idea who she is. Nobody even realises that Khandalyce is missing.
But then AJ goes and gets himself caught for molesting another child, and ends up in jail. Maybe some of the ring start to worry. Then BS (another member of the ring) gets named as a POI in the Tyrrell case. Maybe the guy who owns the property where Khandalyce is buried starts to panic about the chance that either AJ or BS might start to talk, and he decided he has to get rid of the body.
He has to get it away from anywhere connected to himself, the ring, and AJ. (i.e. away from where Ajs truck driving routes took him). He decides to go for another state, because maybe hes hoping that a different juristriction and enough distance would mean that Khandalyces and Karlies bodies would not be connected. He goes to SA, not far over the border, and as suitcase man dumps the body and clothing. Hes not concerned about the body being found, because he hopes time and the elements have gotten ridden of any evidence, and the clothing would not be easily identified, because the victims family have not come out, searching for their loved ones.
