Say Something is a 24/7 anonymous reporting system that allows you to “submit secure & anonymous safety concerns to help identify and intervene upon at-risk individuals BEFORE they hurt themselves or others. You can do this by reporting observed threats, behaviors, actions and harassment” (Suicidal behaviors, conversations of gun violence, etc.). A crisis center will receive the report and send it to law enforcement and school administrators to intervene the individual in question.
Visit their website here.