“…This model was developed to overcome the limitations of other techniques, such as utilizing diagnoses and profiling, to predict violence (Allely & Faccini, 2017b), which can be even more difficult to employ given the small base rate of school and mass shootings that limits potential forecasting efforts (Borum et al, 1999; Rocque, 2012). As noted, this model has been applied to other such mass violence cases, including the perpetrators of the attacks in Oslo and Utøya, Norway in 2011 (Allely & Faccini, 2017a; Faccini & Allely, 2016), Newtown, Connecticut in 2012 (Allely & Faccini, 2017a), Isla Vista, California in 2014 (Allely & Faccini, 2017b; White, 2017), and Charleston, South Carolina in 2015 (Allely & Faccini, 2018). It bears noting, however, that these prior studies focused primarily on the perpetrators’ psychopathology and developmental disorders using assessments relative to conditions like Asperger’s syndrome, autism spectrum disorder, and narcissistic personality disorder.…”