This study examined the psychometric properties of the Risk Assessment and Distress Recovery (RADR) Scale--a new self-report psychological screening tool for high school students that explores risk factors related to mental health characteristics of students who have engaged in school violence. The sample consisted of 1093 high school students from all four regions of the United States. A four-factor model consisting of coping skills, depression, suicidal ideation, and narcissism demonstrated good fit. Results of confirmatory factor analysis and measurement invariance, as well as internal consistency estimates, provide initial evidence for reliability and validity of the RADR. Exploratory analyses between the RADR and characteristics of past school shooters are also presented. Students with disabilities self-reported significantly greater risks for mental health concerns across all four constructs, with small (0.15) to large (0.80) effect sizes.