The criminal event — the mass murder of students at the "Vladislav Ribnikar" school in Belgrade, on May 3, 2023, as a form of mass victimization of students, raised many questions, much more in the lay world and significantly less in the scientific or professional public: Was it possible recognize from the student’s behavior that in the future (immediate, near, distant, upcoming. . . ) he will take action to take the lives of students in the school he attends? Can we talk about the statistically inevitable "Black Swan" in the attack on students? Is the attack on students a consequence of the perception of school security in the security system of the Republic of Serbia? Research results show that such attacks can be predicted and prevented. Furthermore, based on the results of the research, it is concluded that in the Republic of Serbia in 2001, a pilot program of the “Safe Schools” model was launched, which lasted for four years and after 2004, it stopped being implemented as part of the prevention of crime in the local community through the program "Safe Communities". The research results show that in the Republic of Serbia there is no: "Code of school safety and safety behavior"; Law on safe school, students and school staff adopted by the National Assembly; “Declaration on the safety of students, teachers, professors and the school” as an initial document for the safety of the school, students and teachers; "National Center for School Safety"; "School Safety Office" in cities and local governments; personnel for auditing school safety; training for leadership in school security, and does not understand that the application of layered protection of students and the school as elements of support for the educational process, students, school staff and the school is necessary.