IMO, this controversial statement made by a little boy, TP, has not been given the attention it deserves. I truly believe this is one area that LE should have addressed because it could affect the timeline significantly. And it also says something about little Kyron that contradicts the impression of him as shy and not willing to venture off on his own. It's important to know if he was prone to doing just that, ie, leave his group for a bathroom run or to get a drink. iirrc, there is a video made at the school by TH, where she is heard asking, "where's Kyron...he must have gone to the bathroom..". That, coupled with TP's remarks, and the teacher's lack of alarm, says to me that Kyron had done that in the past. A bathroom in a school is not all that unusual a place for a predator to find a victim.
I don't know about any video. I believe there was a photo TH posted somewhere with a caption/comment to the effect that it was typical of Ky to be missing, gone to the bathroom. And the parents were supposedly working with Ky on following instructions at school.
Yeah, bathrooms are a hazard.