One thing I can never understand about the RDI theories is why, if someone in the family killed her intentionally or accidentally, why all this crazy messy confused and confusing coverup/staging/etc. had to be done right then? If it happened in the middle of the night by their hand, NO ONE else knew a thing about it - YET - and no one else would know a thing about it until they decided to start telling everyone about it, which they did, at basically sunrise that very same morning that it happened. But why did it all have to happen so fast and furiously, as I see it? I realize there's the issue of decomposition smell, etc. to consider, but there are ways to deal with that.
They would have known by the time she was dead that they wouldn't be taking their scheduled trip anymore as planned, so if they were canceling the trip anyway, seems like they would have taken a little more time to figure out what to do and not go with this impromptu bizarre, reckless, carelessly-thought-out coverup scheme that no one in their right mind would ever have purposely chosen to do if they had any other options.
Which they did. And that's my point. They could have covered this up in better ways than how people think they did it. What they supposedly did to cover it up was like things that they would do because they had no choice, because they had to get it all done by daylight. Like they were forced to go with this very risky and imo dumb fake kidnapping scenario, complete with the ludicrous ransom note, only because that was their only option if it had to be done by sunrise that morning. But they would have been under no such time constraint. They would've had to do something soon, but not necessarily by sunrise.
If they'd cancelled the plane trip by phone, they would have been free to come up with a better plan that day. No one in the world would know yet that there was anything wrong. No one at all would be dropping by or even calling, since everyone knew they'd be gone out of town. They could have made up some lie as an excuse to cancel the trip and then taken time to do what they needed to do. And I would bet it wouldn't have included writing the ludicrous ransom note if they had. They could even have LEFT THE HOUSE, pretending to do errands or whatever, and in the process, removed her body to some clandestine location where she may never have been found. They could have said she'd been playing outside and the next thing they knew, she was gone. They could have removed and dumped her body somewhere while they were pretending to search for her. Maybe before they had even called police. If my little girl suddenly seemed to have disappeared from our house or yard, I'd immediately start looking everywhere for her and if she wasn't found, only then would I call police. I wouldn't call police first, before even looking for her.
So the way they supposedly did it, according to RDI, had them calling police before they even did a search for her outside around the house, the neighborhood, or even inside their own house -- all because of the stupid ransom note. Since there was that ransom note that they supposedly found FIRST thing that morning, everything after that had to be done differently. They HAD to call police and they didn't even really search for her anywhere at first because duh, the ransom note said she wasn't there! The only reason it went the way it did was all because of that ransom note. If it hadn't been for that note, they would have immediately begun an intensive search everywhere for her around the house at least for sure.
And... sadly, they would have no doubt found her. Down there in the wine cellar basement room where someone hid her, leaving the stupid ransom note behind, hoping to delay them finding her by at least a little while, which is exactly what it did. Probably gave them even a longer delay than that person could ever have hoped for, in fact.
Certainly enough time to ensure that that person was well away from their house by then. Safe and at no risk of being caught for the crimes he committed deep down in the Ramsey basement in the middle of the night while everyone else slept. Or, if he was as crazy and reckless and delusional as that ransom note makes it sound like he was, maybe he didn't actually go too far from the house. I could see him hiding somewhere nearby, close enough to see all the chaos going on at the house, reveling in the knowledge that HE was the cause of all this activity and certain despair and anguish. Knowing what they would soon find out, what he had left for them to find.
That's what I find more believable than that they killed her, in whatever way, and thought the best path forward from this unimaginable tragedy was to have Patsy sit down and write a fanciful, movie-script style fake ransom note in the kitchen, while John was busy garroting and object-raping his 6 year old daughter in the basement. And then when all their ridiculous staging was set, to call police and report her missing and kidnapped and set the ball rolling for all the events to come from that moment on throughout the rest of their lives. Their ruined lives.