Going back to the map and the timeline:
LS and CR are on camera at 2:42 leaving SW (College and 9th)...they head up the ally, this is only known because they are again on camera at the alley and 10th, now the time is 2:48....only 6 minutes later. 6 minutes to go 1 block.
There is the knock on the door at the 10th/College apt, LS falls back and hits head, LS falls face down, and then, they are at the last camera at 2:51, which is only half way to 11th, so this time the pace stays the same, only 3 minutes to go a half block, this includes all the extra activities taking place. My point is, even at 5N, she's only approx. 12 minutes from home in her state/pace, but only 6-8 minutes from 5N to the corner of 10th/College where the clock 'clearly??' stated 3:38 by a witness that may have seen LS. My point is, during this hour and a half from 3:00 to 4:15, LS may have been all over the alley/streets looking for her missing items, trying to find her way home, avoiding people...maybe she left 5N (CR & MB apt) on her own with intentions of going to JRs, but didn't make it to JR's until later...I don't think JR would have put her there if he wasn't involved after Kilroys, she was either there or he was involved in something else. But LS could've been at 10th/College at 3:38, with only a 6 min walk either way, she could've gone anywhere....wondering what else happened in the alley, was CR the one there or was he really in bed, and who else may have been (dark skinned and pointy sideburns???) in that alley with her at 3:38?