My own opinion but the most bizarre part of any of the theories floating around here is the gross reality that it happened at all. Like I've said before, it's like hell opened up and belched out evil, onto a completely unsuspecting family, a family which, by all accounts, was good and decent and hard-working. It's those 20 minutes which fray my brain.... home invasion, wrong house, were the perps (I'm still stuck on more than one) desperate for drugs, cash, guns believing that house would have them? Wrong house theory. Did they come armed? Did they intend to kill, or only to subdue, and steal? Were precious Jayme and her doting mother further victimized during those dreadful minutes? Did Jayme make a run for it, leaving an open 911 line? Did the perps split up, one to get the car, one to get Jayme? Might explain why there weren't three immediate murders... if the second guy didn't have the gun. Again, pure speculation.
I hope they are taking a serious look at that submerged car. And frankly, the whole pond.
Prayers for strength for Jayme's family, especially her aunts... this is all so very awful.