I don't know why SM would leave him in the hallway 150 ft from the door. On a day like that, it would seem reasonable to walk him to class. No other people around and a long hallway....seems odd. She didn't have the baby with her and she made a special trip to see the projects, why not just finish it up and walk the boy to his classroom?
I just watched the video of T's interview made by KOIN. It was not exactly the same as the one I first watched, probably a different 'edition' of it as T didn't mention the door. But it was very interesting in relationship to what you are talking about here IMO.
The reporter said T and Kyron crossed paths in the hallway as they had both been visiting different project exhibits. Evidently Kyron had just come up the stairs from how I heard it because T said he went down the stairs and never saw Kyron again. Kyron mentioned to T he was going to see the 'cool' electrical project which had to have been on the 2nd floor, right?
Then Kore Harlan, a very reputable reporter for KOIN stated it was about 9:45 when the SF was about to end that the students started heading to their classrooms to regroup. It was then the sub who had been hired to help with the SF noticed the group only had 5 and Kyron was not there. Then Ms Porter, the teacher said he was probably in the bathroom or getting a drink of water, said she was leaving and then left.
T also said he saw Kyron's mom leave the school but Kyron was not with her.
Who knows if Kore got everything correct and it was 9:45 when Kyron was noticed as absent. If Terri left at 8:45 that means Kyron roamed about for an hour looking at the projects. It was never pointed out what time T and Kyron crossed paths but it had to be before 9:45 as they were still looking. And it also means T had also been there from 8:45 which is when Terri says she left.
It makes me wonder if Terri really walked upstairs with Kyron {where his classroom was at the west end of the hall], unless it was the east stairway she walked up and she was temporarily parked by that outside door on the main floor.. That hallway would be the length of the upstairs classrooms minus the 2 stairwells.
It is so hard to know, as Kyron could have been walking up the east stairs - we just need more info.
I just wish they'd release the whole T tape uncut and without editing !