Okay, Jo......so now then we have the school to think about. Why did they not follow up and find out why Kyron was at school? Are we going to allow the school to say "Well, the teacher told us she THOUGHT Kyron left with his mom for a Dr's appt." Seems to me that's another assumption this school made on the behalf of Kyron's safety, with zero follow up.
ITA. It does seem as if the school was in the habit of a very relaxed practice of allowing parents to casually take their children out of the school with no questions asked. IMO, this lax practice was very familiar to and convenient for Terri. If the school had insisted that Terri produce a note and check Kyron out at the office, she would have had to come up with a different plan if she wanted to buy that many hours of time. They were played for fools and they asked for it by habitually not following their own policies.