OK, I've been following this case so closely so I'll play too.
The other day my daughter had her 5th grade graduation ceremony at school. I got into the cafeteria, picked a seat, sat down, fiddled with my camera, fiddled with my umbrella (it was supposed to rain), fiddled with my toddler, and waited for the ceremony. After it was over, I took pictures of my daughter, said hi to a few people I knew, and walked out the door.
I have no idea what parent drove what car, I have no idea what parent had a small child with them, I have no idea why people were standing around the parking lot, etc., etc. I wanted to get in and get out. Lots of parents were taking their kids home with them. I don't know who they were or why.
It's the end of the year. People are going on vacation, classes aren't filled with academics; just busy work and things to take up the day....movies, crafts, whatever.
IMO, IF the SM removed Kyron from school that day, it was a simple "go look at the other stuff and meet me back at the car at 9:00". She waited, he got in the car, they left. No one noticed because no one was really paying attention to what was going on. Yeah, people have to be aware of their surroundings, but this was a school. People don't expect this type of thing to go on at a school. They feel safe and secure.
If someone saw him getting into the car, they would've ignored it. She was known around school so who would suspect she POSSIBLY do something like this. IF she did it, it was the perfect day. Too much going on for anyone to really say "hey, where is that kid going?". JMO.