any signs towards any teachers. >> reporter: ritzer's best friend, jen burger says she never made any mention of feeling threatened at school. >> did she ever talk about concern about one of her students or anything like that? >> never. never once. >> reporter: gone but not forgotten. ritzer's legacy as an enthusiastic math teacher lives on. one of her inspiring quotes posted on the school's welcome sign. her loss deeply felt as her students head back to class without her. we have reached out to chism's attorney several times but haven't heard back. as mentioned before, classes do resume today. parents were told last night at a meeting there will be one entrance open and there will be several security guards, police officers there on hand to help students feel safe as they return. this is certainly still a grieving community. kate and chris. >> pamela, there's still a lot of open questions in the days and weeks to follow. we'll learn more about this boy and why this happened.