Glad someone got the conversation going again
Regarding 5N and the 3 POIs, I agree that unless she walked herself out of JR's by her own choice, he is most likely to be involved. I think there is definitely a scenario where JR/MB are involved and CR is telling the truth and uninvolved after his arrival back to 5N, but I think at the very least MB/JR know more than they are letting on. I've stated earlier in the thread that my feeling on JR's probable involvement is him willingly placing himself as the last person to see Lauren alive- a position he had to know was dangerous. It could have been MB/JR together placing themselves as the last people to see Lauren, (MB taking Lauren to JR's, Lauren refusing to stay, JR lets her and MB go at the same time, in different directions, or some version of that) so one has to conclude he's either telling the truth, or he willingly placed himself and only himself as the last person to see Lauren alive (for whatever reason). I doubt Lauren was able to walk anywhere in her condition, and I really doubt JR was administering field sobriety tests, which is why I believe he's involved in some fashion.
My problem w. 5N is how they successfully dumped her body. IIRC, CR's car was searched, so that is probably out. This could be where the guests at JR's apt come in, or possibly where MB comes in. MB seems to have been the most sober of the group, did he have a car, or did he use someone's car? Someone of the bunch had to have been thinking w. a clear head, and my guess is it definitely wasn't CR. JR had been drinking/doing drugs all night, so I'm questionable as to what his state of mind was as well.
I won't hold my breath, but a lot of questions would definitely be answered (IMO) if we could figure out why JR placed himself as the last person to see her, while CR, the last confirmed person to see her, gets to claim amnesia. That's a pretty nice favor to do for someone, no matter how close of a friend you are. The only people to confirm Lauren ever made it back to 5N are JR/MB, I'm not sure CR has even said that she did(someone correct me if I'm wrong on that). Personally, I think something happened prior to even reaching 5N and that's when CR realized Lauren was either dead or in a seriously bad state, and probably panicked. Either he brought her back to 5N and that's when MB/JR got involved, or he called them at some point, or something. Maybe he wanted to call for help and JR panicked because he was the one who gave her alcohol and drugs, so they decided to get rid of the body and just cut CR out completely- one less story to keep straight. That also could explain the 4AM phone call to DR, who was doing klonopin w. Lauren earlier- JR attempting to shove the drug blame on someone else.
One last thing about why I doubt JR's story about Lauren walking home. She had no cell phone (JR said they were calling DR to find it) and no keys to get into Smallwood. She also had no shoes. How exactly did JR expect her to get into her apt in the first place? It's not like she had a phone to call her roommates w. and she also didn't have keys. If he's telling the truth and Lauren walked to her apt by herself w.o a cellphone or her keys, then I think it's obvious JR misjudged her condition. I just have a hard time buying that story at all.