Absolutely Bern!
You're right - that would make the Perfect Storm for a perp who just happened to lure the very kid the teachers did not expect back in the classroom. A perp that won the lottery that day. I just started to think about the odds and got all mathy on myself. LOL.
But, to your Perfect Storm we could add a separated from his class/wandering around school Kyron. In the wrong place & time at the Electricity exhibits. Forgetting something from the car and running out to retreive it. Helping someone out by carrying stuff in. We don't know.
I have to believe that LE long ago examined this communication and the understandings in the minds of both teacher and parent because that breach is so important. They also examined Kyron's mind as well (profile).
On the basis of those same interviews (and others) there was a reason LE launched the SAR mission & issued missing & endangered status for a week.
Something new has come to light and now we have a criminal investigation. But still no warning issued for a predator on the loose...
What came to light? Evidence? Interview inconsistencies? Is the changed direction due to post-interview fact-checking that did not add up? Did the right tip finally come in?
I guess I'm in a math mood today, Bern. Exercising my woman's perogative, that could change tomorrow.