Welcome back, Dr. Doogie. Your info that Anna's kindergarten teacher and possibly her bus driver may join the forum is good news. My next line of questioning, based on my own scenario that Anna was abducted by someone who wanted to raise her as their own child, points back to the school as a possible source of information. If Anna's home was indeed a remote location, so to speak, it seems like there would have been very few people, other than the school, who would know what time she got home from school each day or where she lived. I would be interested in knowing if anyone remembers someone unusual at the school, or someone who showed an unusual interest in Anna.
I'm assuming it was not school personnel that kidnapped Anna but instead a sibling of school personnel who probably lived in another state, i.e., a teacher's sister, etc.