Rustling in the bushes was at the same time the siren went off and was heard east of the house. Go go. I'm still in the beginning chapters. You make an excellent point about the bus driver recalling if someone was absent and if someone was behaving oddly immediately after Anna disappeared. Also, there were neighbors who had moved out shortly before Anna disappeared. I wonder if that vacant home was east near where someone heard that noise near the creek where there were no animals.