I transcribed part of the Lohud timeline because I think it's important and clears up some of the speculation we've had about the alley, lost keys, mystery man, etc. [This part starts after they describe the fight where ZO punches CR in the face]
SC: Corey and Lauren took the elevator down to the lobby and um, Lauren came stumbling out of the elevator. So Corey was the one who got punched, but Lauren was the one who was at least in the video who needed all the help. This was one thing that seemed to contradict the version that's given by CR and his lawyer. Corey claims he suffered short amnesia and that he doesn't even remember what happened. That 15 minutes before the fight, the punch and for the rest of the evening he has no memory of that. So they headed out together, they walked up the street and sat down along the way on a staircase.
MC: And that's where we have a female witness who was leaving, uh, visiting a boy. She's not a college student, she's a little bit older. And she observed the young girl, which we now know to be Lauren, to tip over, while she was sitting on the top step, and hit her head on the concrete. And the boy was sitting a step or two below her.
BD:: And it was loud enough to for her to hear--
MC: You could hear the thud
BD: The thud of her head, yeah.
SC: So Lauren and Corey headed up an alleyway from there and Lauren is seen falling face first to the ground, hitting her head. She didn't even put up her hands to block herself. Corey helped her to her feet and then just a few steps later she crumbled again to the ground. And again, Corey helps her up and they head up the street. So Lauren and Corey headed up an alleyway from there and head into an apartment building at Tenth and College and knock on the door of four girls who were partying with them earlier in the night, but no one's home.
MC: A minute later, the door opening and them going back down and him helping her with that, kinda slung across his back.
SC: So, going down the stairs. Going down, he slings herher puts her...?
MC: He has her arms like this in front of him and he's bent over like this and she's kinda dangling off his back [demonstrates]
SC: But she's... she's moving though. She's not unconscious.
MC: Oh no, she's she was alive and well. I mean, I don't know how well, but...she was alive.
SC: She has another seat. She sits down for about a minute. But at that point she she leaves her keys she drops her keys and an ID card and Corey helped her up the street to his apartment.
[The rest of the story comes from the POI's account of the night, which we already know]
*SC = the reporter. MC and BD = investigators
From: "New Details on Lauren Spierer's Path"
http://www.lohud.com/flash/spierer/index.html