Underreporting criminal activity to authorities can pose significant challenges, particularly within college campuses. Crime prevention teams have recognized the importance of reporting potentially concerning behaviors that may precede violent acts. However, reasons for reporting preincident behaviors have been understudied among college samples and failed to account for informal responses, such as talking to third parties or changing personal security features. The present study surveyed 1,075 students from a midwestern state university and evaluated their awareness of threatening or concerning behaviors on campus, response behaviors, and reasons for either acting on or failing to report preincident behaviors. Findings reflected reporting ...