Also wondering why he brought a large black plastic garbage bag to the hotel?
I thought a little about the bag too - maybe she was put in the bag after the motel, maybe there was a bag at the motel or maybe he brought the bag.
If he brought the bag that sort of validates the premeditated murder theory but we may never know since most of what we know so far is from what SZ has confessed to LE and it has been shown repeatedly that SZ is not honest.
One of SZ's first reprimands as a LE officer was for lack of honesty coupled with embezzlement later in life so I see no limit to his ability to be deceitful.
The lack of honesty coupled with a question asked by "OhThatVictoria" - "Why did he leave his props in place w/Laura and not Jenny?" made me think that he possibly did so on purpose with Laura.
In my opinion it is possible that SZ realized that he would need an excuse for the murders should he ever be caught.
His behavior prior to the death of the victims suggests to me that he thought that he was above the law. Its not a reach for me to think that SZ would have been able to convince himself that he would be able talk his way out of being responsible for the deaths of Jenny, Laura and possibly others if he had an excuse.
He may have chosen to leave the props in place with Laura or add them after the fact along with the rope on Jenny as a way to attempt to validate the excuse of it being an accident.
This makes more sense to me than a random accident without any effort made to save their lives such as calling 911 - especially if SZ intended to kill his victims before he ever met them just using the BDSM site as bait, as suggested by "Judy".
There is also the detail that the only source of information about which day Jenny died is SZ.
Since He has been proven to be dishonest I have to ask myself, did he really let her live 3 days or did he kill her on the first day and then lie about the series of events to try to add merit to the excuse of it being a consensual accident ?