Re: S/Sgt Beatty buried in Australia
What you are suggesting is that he is missing because authorities, either military or civilian, had his body and lost it. It's possible but not likely. Do you have documents that make that case?
There could be any number of scenerios that would give an explaination.
For instance, his survival of the crash and subsequent death was reported by his surviving companion but authorities were not able to retrieve his body. They could have crashed out in the ocean where a body is easily lost. They could have crashed out in the trackless desert, which covers a majority of Australia, with the same result.
Why did you zero in on Perth? It's well away from the combat zone.