The fact that only DR took an FBI-administered polygraph seems significant in that he wasn't with LS toward the end of the night, in contrast with the other POIs. So ... if there was a coverup of whatever, he probably wasn't involved in it, IMO.
The Lohud article mentions DR admitting to doing Klonopin with LS. I realize it's possible that another POI gave her something else, but I'd assume she told JR or CR what she'd taken, and hence he/they wouldn't feel as responsible for an OD.
So IMO 1) something happened later on that DR doesn't know about (or didn't at the time) and 2) the OD/disposal of body theory doesn't hold as much weight as it used to.
Unless whoever supplied the Klonopin provided her with something else later?
I'd never seen proof that DR admitted doing Klonopin with LS. I do recall secondhand statements to that effect. If he is directly quoted please post or at least the date of this article. At the time, I researched Klonopin and there is no question that it could cause her to fall and / or drop dead, all by itself. In conjunction with other substances and / or her falls and possibly her health it could have killed her. And from the time they supposedly ingested it, the effects would have been peaking around 4am, making it pretty much impossible for her to walk just a few minutes later. Look up the metabolic characteristics of this stuff. It does make sense that JR calls DR at 4:15 because of her condition. It also makes sense that DR did not answer because at 4:15 DR should have been unconscious as well.
Why would this in any way change the OD / Body disposal theories?
If she's dead from Klonopin, that doesn't mean those with her knew that.
The most plausible thing that happened in my mind is that one way or another 1,2 or 3 of them wound up with a dead LS and didn't want to face LE at 3:30 - 4:15 am The 3 main POI's did not necessarily know about the cameras. If LE arrived at CR/MB's or JR's and saw LS's injuries and questioned any of these 3 at the time can you see a different outcome here? It's very reasonable to assume that they were scared of what might happen if they were caught with a 4'11" 98lb dead 20 year old girl who looked beat to death. LE would not be very friendly. At the same time, CR was messed up, JR had been drinking heavily. That would look real good to LE too. Any average person even just sitting there watching, who was drunk and tired might be scared to face LE under those circumstances. The idea that maybe one would be serving 20 years in prison for murder could easily pass through their mind. They had no way of knowing that LS's falls were witnessed and recorded. They would have no way of knowing what killed her and that DR would admit Klonopin was used. As the saying goes "Hindsight is always 20/20". Even as I'm willing to accept other theories, nothing seems to fit the circumstances and facts better than this. If it were disproven, that would be fine with me. But as more facts have come in, it's only solidified this theory for me, and weakened others.
I do hope that they will make a deal and admit what happened and give the Spierers the truth AND LS's location. If she died from Klonopin + whatever, that's something they need to know. The reasons why this was covered up, might be less sinister than imagined. If it is what happened, keeping quiet at this stage is horrible, and the longer it goes on, then it's as though they did kill her (to me). Torturing LS's family by not coming forward with the truth is evil. It's my view that if they aren't forthcoming soon, and then later it's proven they covered it up, they should get 20+ years. They may think they can bargain their sentence down later, or that they can just skate on through life as though nothing happened. How guilty would they feel if they figured she OD'd by her own actions? I'm sure they could all go on with their lives, finish school, start businesses, etc... oh wait... that is what they are doing.