This is my today's theory. I woke up with it. And it explains almost everything, especially some of the parents' statements and lack of urgency.
Jeremy goes to work, Deborah drinks with neighbor, boys watch video. Lisa is in her crib.
Debbie has "enough" to drink, and, as she said in one of the interviews, when she drinks and has had enough, she just wants to go to sleep. She likes to sleep with the kids. She mentioned this too many times to ignore. As she was telling Judge Jeanine (not positive it was JJ, but it was one of the early interviews) about this (liking to sleep with her kids), Jeremy cuts her off. Something about this is important.
She goes into the boys' room and says "come sleep with mom" and then gets Lisa from the crib. They all get into bed.
But there are too many people in the bed and somebody, in their "dead weight" of sleep, rolls onto baby Lisa and she smothers. Or Lisa gets pushed out of the bed and gets herself into trouble (cord from the blinds, or something). It's not on Deborah's side of the bed.
Jeremy comes home, probably around 2:30AM. He indeed asks, what's going on? And here is where Deborah has told the truth. Jeremy says, "what's going on, why are the boys in here, where is Lisa?" Deborah may have forgotten that Lisa was in bed with them (since she is NOT now). In a sleepy stupor, she says, "what do you mean, where's Lisa?" And then they find her on the floor.
After going through the "ruthless" custody battle with the mother of his child, Jeremy is in no way going to allow anything to appear as though his house might be unfit for a child. It would give ammunition to the mother. They can't be having a 'drunk mother sleeping with too many kids, one of whom ends up deceased. That would look like negligence. He knew she had been drinking. And he wants to protect his family members from incrimination.
At this point, the one boy (according to one of the versions) does wake up in a trauma and realizes what's happened. Then Jeremy comes up with the staged intruder explanation. The parents do whatever they did with Lisa. I don't know what this involves, except that it's hiding Lisa's remains. I don't know who hid her or where she was taken. The phones are part of the intruder scenario, just as Jeremy, in some of his few words, stated so explicitly: "they took the phones so we couldn't call..."
When they were done doing whatever they did with Lisa and the phones, Jeremy calls 911.
This explains why they are not searching for Lisa, why they refer multiple times to "the boys" and their sleeping with Deborah, and constant references to them. This is why they can't get their stories straight about who was sleeping where and the order of events when Jeremy arrived at home. The boys are central to this and at least one of them does have significant information. And although nobody did anything evil or on purpose (except LIE, which I don't want to minimize, but it's not murder), they now have themselves in a bind. How do they change the story NOW and say it was an accident? In the meantime, they are starting to break from the stress....maybe the boys should talk to LE...yes, no, yes, no, yes, no, So they stall to buy more time.
JT has been told what happened. He thinks they should come clean (I know, I am shocked that I think this). Deborah and Jeremy are struggling with this. They go away for the weekend. They have a family weekend and let the boys have Halloween.
When the boys are interviewed, everything will probably come out.
This "hypothetical version" actually gives me some peace. I think the baby is somewhere where the family feels comfortable with where she is. I don't think they threw her into the woods to let weather and creatures get to her. In this version, some bad judgment occurred, a tragedy resulted, and stupid decisions were made. But no harm was intended.
By tomorrow I may have a different theory.