I think it depends on whether or not any of the neighbors noticed a van in the area. Perhaps that van was unfamiliar to CB, but would not have been unfamiliar to someone who resided in the area. Maybe a neighbor who knew so and so sometime drove by to see the horses. It would seem more likely to me, the car or van involved in Anna's abduction would not have followed her home from school that same day, or at least that same day for the first time. But rather several times in the weeks or month(s)? prior to Anna's dissappearance. The same day is just too risky imo. Someone would have had to follow the school bus previously, became familiar with the afternoon routine enough to take the opportunity that day. Even with the comings and goings with company that day. I don't believe it was some random person who just happened to see Anna at school on the 16th and decided to follow the bus that day. Did the bus driver ever indicate she noticed a car or van suddenly sharing the same route in the weeks or month(s) prior to Anna's abduction? When one comes and goes at the same time daily, we tend to notice those things; which neighbor leaves at the same time; which people are at the coffee shop at the same time before work each day........ Were there older grades on the same bus that might recall some weird van following their bus home on a daily basis? One that was behind the bus for days or weeks then suddenly not there anymore? Where was Annas stop in relation to the bus stops? Was she one of the first or last children along the bus route to be dropped off at home? IF the person learnt of Anna's residence by way of following the school bus, they had to take enough time to follow the bus to learn the daily routine of the bus driver, where stops were made. It would be interesting to know more about the bus. Did it include more than just the school Anna attended? Or did it pick up children from various schools? Were there any other attempted kidnappings around that time that involved school buses in the area? ETA: We need to think about what the bus driver and students who rode Annas bus may have seen outside of just January 16th.