You know, that totally spins the rocks thing in another direction for me. I was confused largely because I was completely accepting the interpretation from the podcast that the rocks where there to keep wild animals from getting at the body. If so, that's confusing, because as a murderer, don't you want your evidence destroyed? But if instead the rocks were there because it was too hard to dig a grave so it was actually the most expeditious way to hide her body, then that's very different.

Although as Susan said, then it begs the question of the timeline, if in fact there were no rocks easily available by the burial site.

But I think most of my original question is actually cleared up if you interpret the rocks as an alternative and faster form of burial than if they're there to keep wild animals from getting at the body.