You make some great points, I;ve always wondered about the first 2. Without a time of death couldn't of happened anywhere from say 3:00 till the time the bodies were found.
I thought about SK because of the few facts LE was letting out about crime scene and COD, but what are the odds of a SK being there at the exact same time as the girls. Iam leaning towards that he knew they wre going to be there.