I think it was TH, all by herself, either out of a side door, or possibly through the front. This is a woman that was confident that everything was okay and was doing a thumbs up right before her child was taken and a divorce and restraining order was issued against her.
I think she has narcisstic tendencies if she's not a narcissist, and just had the confidence she could make sure Kyron was seen at school, and then make sure she was seen leaving alone and got him out some other way, or they were seen together, but she wasn't worried. If she was known around that school, I doubt people would have even blinked at Kyron leaving with her, or because it was so busy, one little kid fell off the radar - maybe she was counting on that.
She seems to think she has everything covered. An answer for every question, and now a lawyer so she doesn't have to speak. I think she still might be foolishly confident that they can't catch her. She thinks she's thought this out so well, and no one can take her down. As long as they don't find Kyron's body, she'll be okay (sound familiar to anyone?).
The problem is, we're all going on normal thinking. I don't think she thinks normally. I don't think she worries about things in the same way we do. We'd be all paranoid about taking our child out of school and someone seeing us. I just don't think she worried about that. I think she believed she could explain it away later, and certainly her family and friends would vouch for her, and no one would believe she was capable of harming a child.
I think she lives in a fantasy world where she can't do anything wrong and it's everyone else that's wrong. Who knows, maybe she saw in a movie or on tv someone snatching a kid from school and thought she could do that too, how easy would that be for her? Again, this is not normal, everyday thinking the way us at WS or a normal person would think. This is a delusional, narcisstic, possibly sociopathic person who thinks very differently than we do (not proven, but things are adding up to suggest this).
If I've learned anything from the CA case, it's that these people's thinking is vastly different than our own, and trying to put logic into thinking like that is just going to cause more headaches and frustration.