[Question] Questions about school shootings

Does anyone have any info on the effects of saving a person or people from a school shooting, either by preventing it, saving them using interventions, if they saved themselves, etc? (e.g. The effects of the trauma of the school shooting on the survivor(s) if they went through a shooting, the increased social impact of the survivor(s) due to motivation if they went through a shooting, estimated remaining life years, conditions of the places targeted for shootings, the effects of preventing a shooting on the potential perpetrator, QALYs per life saved, etc.)