About teachers speaking out... Initially, there was a post on social media from a school volunteer. It was subsequently deleted, likely as it got pointed out that volunteers still need to maintain confidentiality. There was another social media post of a drawing done by a classmate and friend, shared by her mom. I hope mentioning them is okay, just in context of reassuring people that there are school community members who have spoken out. There's nothing specifically sleuth-y this is meant to contribute. Just a reply to an earlier comment.
The main thing I registered to contribute is on autism. In Nova Scotia the wait list for diagnostic assessment is years long. For pre-school age kids it goes by birth date, not referral date. So with shortage of services, PLUS a population increase, the list keeps getting longer. They're currently assessing kids just who are almost 5.
And that's for preschool. If you don't get referred in the preschool age bracket, once you start primary it's a separate system. The assessment is done by the school system, not the health system. But the schools are more by triage, not birthdate. Where kids with behavioural issues are more urgent than quiet kids with autism. So an autism diagnosis, especially for girls, might be a few years waiting.
I have zero specific knowledge of this family. But I would surmise based on general experience of the area and related income and demographic pressures, that they didn't have a lot of knowledge about developmental milestones. No one flagged any autism traits until they hit school. (In one of the media interviews, the mom phrased it in terms of it only affecting them keeping up in school.)
So usually teachers and parents here have an awkward year or two of presuming their kids are maybe-probably autistic. But not having the paperwork to truly own it. (And grandparents in their other ear saying "they'll grow out of it", etc.)