[SS.I 4.0] Dr. Langman presents his four-pronged model of the factors that contribute to school shootings. This article discusses Evan Ramsey, Kip Kinkel, Eric Harris, Adam Lanza, and Nikolas Cruz. Reprinted with permission from L.W. Collins, T.J. Landrum, and B.G. Cook, eds., Issues Around Violence in Schools, Advances in Learning and Behavioral Disabilities, vol. 33, (Leeds: Emerald Publishing Limited, 2023).