FC
It's odd, it was an up close and "personal" killing, but carried out in an impersonal, cold, calculated manner. I think that's why we are all so confused and having a hard time settling on a motive - it's both personal, in that the killer(s) must have been standing face to face with the girls and not more than a few feet away, and yet the shooting was so efficient and so deadly and so fast. There wasn't a bit of hesitation - and it was done in a place which was almost "public" - the killer(s) sure didn't make it possible to "linger" with the victims. Like I said - impersonal and yet very personal. That's why I cannot believe there was more than one shooter - a killer with this level of disassociation and calm efficiency when executing children is not (logically) a novice to this type of scenario.
Sociopaths or experienced assassins would not normally appear in rural Weleetka in PAIRS would they?
My Opinion
I agree with what FlowerChild says. It is the only thing in my mind that makes sense...... Not that anything really does but this does fit.
But we are not psychos here (I hope not) so how do we really know how these folks think & rationalize