Taking a step back on the timeline, looking back to about a month after they disappeared based on this MSM article, just reminding myself what happened based on the known facts and what their parents stated:
"Investigators have confirmed Lilly and Jack were seen in public with family members on the afternoon of May 1, based on the details police have gathered.
RCMP declined an interview request from CBC News.
The children's stepfather, Daniel Martell, has said the children were home from school on May 1 and 2 due to illness. They were also home on April 30 for a planned professional development day at the school."
So as far as can be gathered from these facts, and assuming it's been confirmed, Lilly's and Jack's last known status the week they vanished:
Monday & Tuesday April 28 & 29
They attended school and rode on the school bus to and from, and nothing has come out anything seemed wrong with them AFAIK (e.g., teachers/bus driver saying they seemed sick or had any obvious injuries [referring to the black eye(s) that were mentioned more recently in MSM])
Wednesday April 30
They had the day off from school for staff to conduct a planned professional day, and were presumably at home.
Thursday May 1 & Friday May 2
Their mother called their school and said they would not be attending due to having a "cough", effectively giving them a 5-day weekend off from school and right after the professional day.
- On Thursday when they were off school due to illness, when the rest of their classmates returned after having the previous day off, they were seen in town with their family, yet they were too ill to attend school that day or the next day.
- On Friday when they were off school again due to illness, they vanished from their home in the morning hours some time, with neither of their parents or relatives living nearby hearing or seeing anything, with the only info on them being their boots were missing from their home as well as Lilly's backpack.
Thinking about the professional day some more, I wonder if scheduling this type of day off in the middle of the school week was a common practice at their school. In the U.S. in my experience, professional days are usually scheduled at the end of the week or adjacent to a holiday to take advantage of grouping days off together for longer weekends for everyone, and were intended to give staff time to attend to issues outside of the day to day running of the classroom. It could be it is more like a "professional development" day for training and that sort of thing, but a family member of mine was a teacher in public school in the U.S. in a disadvantaged region, and she told me these professional days (or "in-service" days as they were called) were often the only time when staff could get together without being fully engaged in the day-to-day rigors of teaching and engaging with students, to talk about issues of concern and observations they may have made about specific students. Given a breather from their full days focused on teaching classrooms full of children, they were able to make progress collaborating & decision-making on any students they thought may require support or they needed to take action on in terms of required reporting regarding child safety at home.
I also wonder now, looking at this schedule where the professional day occurred in the middle of the week with a fresh perspective, and knowing in hindsight that staff at their school had reported concerns about their well being to child protection previously, what types of activities and topics the staff would be attending to "professionally". For example, did it include planned time or extra time as needed for breakout sessions to discuss specific students and their needs and safety at home?
If so, and that's a possibility, what if that's one of the reasons why Lilly and Jack were kept home from school for 2 extra days after the day off for the professional day when they weren't so sick as to have to stay at home (being seen in town the 1st day)?
Because their parent(s) were wanting to avoid any additional scrutiny due to one of their children ending up with a black eye again, and/or they were wanting to avoid facing the music that may have come out of the meetings amongst staff the day before?
It's giving me any uneasy feeling to think of their school absences that week from this new perspective, if things were escalating at home in terms or neglect/abuse, and real concerns were escalating at the school, and their parents could sense the jig may be up....
And then they just disappeared between the 1st day and 2nd day they were "home sick".
Knowing now what I didn't know then (back at the end of May when the article was written) that the school was working with CPS and memos were being prepared or were prepared On The Day They Went Missing (May 2, linked upthread) about increasingly grave concerns (my wording) for Lilly and Jack's safety their school staff had.... I have to wonder and wonder some more, what kind of perfect storm of circumstances led to their disappearance, and their mother moving out of the house a few days later never to return or speak publicly.
JMWO (just my worried opinion). Still waiting with baited breath to hear they have been found or that charges have been brought against any POIs and/or suspects LE has been investigating who may have been involved in their disappearance and possibly their murders.