Doll - Angst

Yesterday a terrible thing happened - a group of workers were attacked attacked by disassembly drones outside the bunker when they went out to get some materials, information or something else. Two of them died, three were injured. How sad for them.
You are the key keeper at school. You're always the last one to leave the classroom to close the door. You turn to look around the classroom and see Doll staring blankly at her desk. You call out to her to come out, but she doesn't answer. What's wrong with her?