I've been reading everyone's likely theories as to what happened. Here are some ideas and concepts I'm struggling with:
First, I just don't agree with the idea that LS got randomly abducted, either on the way to Smallwood or the way to JW's house. Yes, it is possible, but only because anything is possible. Realistically, knowing Bloomington and knowing the areas she would've been walking in, there is a far better chance that she would've been assaulted and raped and left in an alley than to have gotten swooped up in someone's car. Not that the assault/alley combo is likely to begin with, but it's far more likely than her just getting abducted.
The idea that she tried to go to JW's house is not itself implausible, and this is a girl who would've been well-conditioned to making that walk, because JW's house is in a nearly direct line between LS's apartment and the heart of campus, which is where her classes would've likely been. I do think it's more likely that *if* JW is involved, he likely walked over to the area between Smallwood and 5 North --- that walk isn't going to take any more than 8-10 minutes.
Now, regarding the OD theory...I agree with curiousgirl and a few others in that I just can't see an OD being part of this story, for a couple of reasons. First, as has been stated by others, the idea that the guys would freak out to the point of ditching the body after an OD seems implausible, particularly since they were likely as effed up as LS was. Even if they were, the idea that they'd allow the case to fester like this, and possibly put themselves in danger of being accused of murder, makes even less sense.
Plus...think about how this might have gone down. If she ODs and goes into a drug seizure, it's not like she's going to die immediately. Almost anyone watching that situation is going to call 911, because watching someone going through a drug seizure is impossible to ignore. Plus it would leave all sorts of nasty fluids and DNA all over the place...not just on carpets and furniture, but probably on other people's clothes.
If she passed out without seizing up, I can't imagine that her male companion(s) would immediately leap to the conclusion that she was dead. I would think a catatonic LS would have just been laid on the couch to "sleep it off"...not disposed of.
The more I think about this case, the more it seems like the crucial time period is 2:30 AM - 3:00 AM. If you're like me and you discount the OD and abduction theories as implausible, then the prime period of time for something bad to have happened to LS was from the moment she entered Smallwood until the moments after she went out of view of the camera at 10th and College Village.