The purpose of this study is to examine how recent incidents of planned mass violence in high schools within the United States were successfully averted. Using the Averted School Violence database, this study utilizes a mixed-methods content analysis approach to analyze 82 incidents of averted mass violence in high schools that occurred post-Columbine era. The following three themes were identified: attack motives and logistics, plot discovery, and attack aversion. Implications for professional school counselors in preventing similar mass violence attacks in the future are discussed, including fostering trusting relationships between students and adults, providing education to parents about social media platforms and proper firearms storage, establishing threat assessment teams, and educating parents, students, and school personnel about warning signs for violence.