(snipped for focus)
Could you expand on what you mean by her inaction at that point?
I think it's pretty normal if your 13 y/o isn't where you expect them to be to not
immediately freak out, and to instead check around where you think she might have gone. The final bell for school was at 4:04pm. I'd imagine it takes a bit (15-20 minutes?) for all the cars to clear out and for it to be apparent that MS was not waiting to get picked up. Then, JS looks around, doesn't see MS, then goes back to the school. The Sheriff's Office says she reported MS missing at 4:43pm, and they arrived to a location near the school at 7:48pm. It's possible that the "reported time" from the Sheriff's Office means that that is not the time of the report, but the time that JS reports MS began being "missing," but from the context of the Sheriff's Office report that seems very unlikely.
All sources from the
timeline in the media thread here.