To me it is really surprising that none of the geocachers came across the suitcase if it had been there since 2008.
Apparently there are dozens of caches in that area.
I had never heard of Geocaching prior to this case.... so for those who aren't aware - as I wasn't...
There is an international "game"...where people hide a container ....in the container is little trinkets that people can take and swap with something they have...basically a treasure hunt or a weird sort of GPS orienteering game.....people log (write on a piece of paper that is contained in the container..when they found the cache - they can also log onto the geocaching website that they "found" the cache"... link to Geocaching:
https://www.geocaching.com/play
Some of the earliest Cache's hidden were placed in late 2011...in roughly that same area that the suitcase was eventually found.
One cache placed hidden in 8/11/11 a mere stones through from the eventual "Discovery"...had been visited 246 times...
Geocachers had been all over that area since 2011.... a suitcase hidden..would have been found and foraged through IMO...as is the nature of a Geocacher to notice - what is out of place...that's the whole idea of the game... Maybe the did...and quickly decided it was just old clothes...But I am surprised it has/had taken so long to notice human bones...
To be honest - I have some doubts that the suitcase was disposed of along the Karoonda Hwy in 2008 ...and has taken this long for it's contents to remain a secret...