I put this post on Reddit a long time ago now and I stand by it, and here's the reason why I'm asking these questions, am truncating this post:
I don't know if this house's (Sherrill's) landscaping has changed significantly since the time of the event, but when I "streetviewed" this house, it looked like a serial killer's dream. It is juxtaposed to a little business commercial building on one side and directly across from this home is a huge complex with a gigantic driveway, these are all closed at night. That huge complex has been there since 1986. The neighbor's house on the other side of Sherrill's house has the neighbor's garage butted at the side of Sherrill's home. There are massive trees outside her house, this house hides in a tiny corner, I almost missed the house entirely on the streetview. There are multiple points of entry from the outside to within this home. That could be (jmo) an out of town serial killer who does plenty of traveling who stumbled across that house-- somehow. Who knows how, maybe also in town for graduations, maybe at one of the parties, and/or maybe he saw the attractive woman out late at night painting a piece of furniture and (correctly) guessed no man in the house. Or maybe he spotted Suzie with "Sweetr" and followed her at some point earlier to that house. Maybe both these scenarios. So my theory is he knocked or rang bell when Sherrill was laying down, she answered the door, and he gained entry by displaying a gun. He convinced her he'd leave her alive, but then strangled her to death (no blood at crime scene/no noise). He left Sherrill's body in the bed thinking if he left all the lights off, Suzie (who I think he anticipated) would not wake Sherrill up when she came home and would just peek through the door at most. He either sedated the dog or fed the dog-- secured the dog in some way. Perhaps shut Sherrill's door and let the dog run free. He got Sherrill's key to the home and/or left unlocked one of the many doors in that house so he could regain entry. The girls returned home, got ready for bed, went to bed. He re-entered, that's why they hear the dog barking at 3 or 4 am next door. The girls have been partying, they don't wake up. It's a kingsized waterbed, he strangled the girls silently in the bed, very careful not to wake either of them. He then wrapped them in materials he has in a vehicle which I'm guessing may at that point have been parked in the carport. Maybe rugs, if not, something along those lines. I believe he broke the globe on the porch light when he slung the bodies over his shoulder to place them in his vehicle. He purposely left that light on at the porch because he'd be able to tell later if someone had finally entered the house after he'd left. He went through those purses figuring out some names and personal info for his victims, probably took the phone number and possibly made obscene calls later.
I came up with his theory by trying to figure out how some serial killer that travels frequently could have committed this crime. I'm not saying "this is the way it happened." I've got no flipping idea. But certainly, it's a way it could've happened. I've always suspected all these women were dead by the time they exited that home, and I still do think that was probably the case. Such a scenario actually wouldn't have necessitated multiple actors. One could have done the job.
