“…A psychosocial crisis was consistently associated with certain observable warning behaviors that indicate the planning of a violent act, or the preoccupation with violence, respectively, as well as early crisis symptoms pointing to a negative psychosocial development -as several analyses of school shooting cases suggest (Meloy, Hoffmann, Guldimann, & James, 2012;Meloy & O'Toole, 2011). Symptoms for a general crisis that were found in case analyses were school failure, rejection of schooling, social withdrawal, aggressive behaviors, self-injury, psychosomatic pain, or other sudden behavior changes (for an overview see Scheithauer et al, 2015;Leuschner, Schroer-Hippel, Bondü, & Scheithauer, 2013). Violence-specific warning behaviors are verbal or written threats, leakage of violent intentions, preoccupation with violence, or suicidal intentions (Meloy et al, 2012;Meloy & O'Toole, 2011).…”