Taking another look at the journey from Kilroys to 5N...
There are several 'documented' events/time stamps during that 45-60 minute period, but a lot of uncertainty about how they might fit together and about how what happened during that interval might have played out during the subsequent hour or so.
Several others have carefully enumerated what is 'known' to have happened when and where. I'm wondering WHY.
CR is said to have the hots for LS, and maybe that's reciprocal. Let's just say she's at least a little bit interested. But she's the long-term girlfriend of JW who is at the edge of CR's circle of friends, and JW is older and presumably has more status within that group and within their (disbanded) fraternity.
So CR and LS get together, get a buzz on (and maybe more...) at 5N, then head to the bar. While at the bar, LS's buzz goes over the top and she's kicked out. CR follows. I'd assume that he's pretty wasted as well. Now they're on the sidewalk outside the bar - where to go next? I'd assume that his inclination would be to get her to his place ... but they go to SW. Why? Maybe he's a gentleman and/or sees that she's too far gone and decides to take her home. Maybe there are party supplies to be had at her place or elsewhere in SW. Maybe there's a party there. Or, maybe SHE wants to go home - to go to bed, or to get some shoes, or to find her phone, or some other reason. Did he drive the decision at this point or did she? Why go to SW and not to 5N or to a party elsewhere? Was LS looking to continue at this point, or was she ready to quit?
Whatever the reason for going to SW, it seems to have been thwarted by the encounter with ZO and his group and CR getting punched. Why the punch? Was ZO looking for them? (I would assume that once LS and CR showed up at the bar together (if not before), texts would have been flying about JW's girl being out with another guy.) Or was it a random encounter? Did CR get punched because he was with LS or because he was acting lecherously toward her, or did he and ZO have a history of animosity, or did CR say or do something to piss off ZO?
So they leave SW. Were they leaving in haste and in fear, or just wandering off in search of Plan B? Was CR leading or LS? Or did they stop to confer and decide what to do next? Given the report about LS stumbling off the elevator, CR was probably leading the show at this point.
After leaving SW they evidently made their way to the north/south alley between College and Morton headed north - or did they walk north up College? Did they go out the front door of SW (onto College) or a back door (onto 9th)? If they were hoping to avoid observation, I would think they might have headed out a back door. But, assuming they were both pretty wasted, they probably used the habitual exit of whomever was in the lead. (Since CR was 'banned' from SW, he would be likely to know about all the back doors and be inclined to avoid the front lobby.)
Next stop was 10th and C. Did they plan to go there, or was it a thought that occurred as they passed by, or were they in need of help - any port in a storm? And did they go up the alley north of 10th and go around the north end of the building, or walk up the alley to 10th and turn right, or maybe pass 10th in the alley and then double back? Did they go to the front door and buzz up from the lobby or make a cell phone call from one of the back doors? Were they looking to connect with ZC or with one of her roommates or, maybe, someone else in the building? Did they try to contact anyone else in that building - or anyone else at all a that point? It seems that if they had a reason or a plan to get together with ZC that would be one thing - and they would have headed directly to the front door of that building and used the buzzer. But, if they were in distress and in need of help, that would have been a very different situation - and they might well have followed a different route and would have been more likely to call from the alley.
How about the audible collapse on the steps and the face plant? My memory from the PI video (many months ago - and I haven't looked at it recently) was that both incidents happened more-or-less sequentially. Did these happen near the front door - near the intersection of 10th and College (where there is no camera) - or in the alley? Or were they 2 separate incidents in different places? When did she drop her stuff in the alley? Seems that would be likely to happen during the face plant.
LOTS of questions and unknowns. I would hope that LE has asked and answered these questions and many more that have not occurred to me, and it would sure be nice if they would share their answers with us.
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My take is that things turned for the worse somewhere between SW and 5N at about 3am and that LS was not moving under her own power after that point. He/they tried to contact ZC for help. When that help was not forthcoming, and then when TG's mystery witness came upon them, he slung her over his shoulder, said everything was under control, and headed to 5N.
My $0.02,
- John