This document discusses crisis intervention in schools and the role of school resource officers. It provides examples of past school shootings and discusses the prevalence of mental illness among students. School resource officers are often the first line of defense against school violence since they are trained in crisis intervention. The document also describes a case study where a school resource officer in Montgomery County, Maryland helped intervene with a student exhibiting signs of mental illness and potentially threatening behavior. Through collaboration between school administrators, police, and mental health professionals, the student was evaluated and referred to treatment.