LE's quote: " ...again we know the time that she entered the church, which I believe is going to be around 4:18, again approximate time, we see her in the video. She's walking down the main hallway in the vicinity of where we located her, but when she gets out of the range of the camera it doesn't pick up the motion and the camera turns off, so we don't have anything. Like I said, we have no video of the assault actually taking place."
LE quote: ...she was found "in the southwest corner of the interior of the building"
1
She's walking down the main hallway
a - "MAIN" hallway is obviously the westside hallway. Nothing else fits. The others are side hallways, back hallways, etc but one hallway in that church is bigger, wider, and accommodates all the people coming in the main entrance.
b - She doesn't just enter the hallway but walks down it, indicating her walking in that northward direction
2
when she gets out of the range of the camera
The unsaid but clear implication - camera follows her for a ways as she is walking down that hallway
3
when she gets out of the range of the camera it doesn't pick up the motion and the camera turns off
She walks far enough that the camera stops recording
4
the camera turns off
The indication is that she would otherwise have still been recorded, if the camera isn't off - meaning she is still walking in the westside hall at this point, and not somewhere else that the cam can never see
5
we have no video of the assault actually taking place
From the camera turning off, then after that the assault took place unrecorded
6
down the main hallway in the vicinity of where we located her
This is what tells us that the location was not far from the end of where the cam stopped recording. It doesn't say in the hallway, but it does say "vicinity" of that, so it might or might not have occurred in hallway. Since the assault didn't trigger a cam, I take it that it was not done in the hallway (but it can't be said for certain).
7
the southwest corner of the interior of the building
"Southwest corner" can be seen in any number of ways (the very SW corner? somewhere within the SW quadrant?) as can "interior of the building" (the entire structure? the interior sanctuary area?) as can "corner" (an actual corner? a broader area that fits with the generalized location indicated?), and there's probably a bit more specificity in the "vicinity" limitation.
The library doesn't fit, because it's down the southside hall, not the main hallway. The bathroom area doesn't fit, because it doesn't have her walking in the westside hallway until the cam stops recording due to distance.
I end up with something like this, which accounts for the LE statements above as well as how perp might have exited unseen through kitchen-area door: