Why was the only option placing them all in one grave? How about digging 3 separate graves? Duh.
You've just made me think of something. The tanks are a much 'better' hiding place than the shallow grave. What if the shallow grave was plan B? If that was plan B, then what would plan A have been and why couldn't he achieve plan A?
He ought to have been aware enough of the size of the holes on the tanks and that Shanann couldn't go in one and the girls in the other ... if weight distribution was one of his concerns it would be a higher differential than putting one girl in each tank, but that could have been plan A?
It's possible that it was the reverse, that trying to dig a deeper and larger grave was too much work and he looked up and saw the tanks and figured that would be an option, but that would only work for the girls, so he had to separate the bodies.
Where was the sheet from the bed? Was it laying loose nearby or was it part of the 'grave'? Then there's the plastic bag that might have had a footprint on it.
I think once CW got to the oil site he felt he had to leave the bodies there, but his original plan might not have worked and so he decided to do it this way, and it's left the site a little bit haphazard?
@stereopticons ... how many murderers would have that much awareness of the psychology of not wanting to put the bodies together for the reason CW's father says that CW told him? It doesn't even make any logical sense as the girls were in those vile tanks and weren't even 'huddled up together' as CW said he hoped they were in his media interview. What was the real reason for three distinctly separate, though relatively close, locations? What did CW really think Shanann had done to deserve to be separated from the girls? Is he talking about in life or in death? Because if that is the truth of what he said, and the truth of what he was feeling at some point, then it carries insight if we can unravel the clues? It seems reminiscent of a family annihilator who murders to punish the victims, like when they murder the children to punish an ex-spouse.
Btw by saying a 'better' hiding place I only mean from the perspective of a murderer trying to cover up his crime, I am
not suggesting that it's in any way reasonable or decent.