Mass shootings and attacks have increased significantly over the last decade in the United States partly due to the rise of social media and online engagement. Some of the largest mass shootings in history involve an attacker that publicly announced online their intentions to commit an act of violence hours, days, and sometimes weeks beforehand. This session will discuss the merits of having an proactive threat detection program for online violent threats and proactively providing disclosures to law enforcement. The session will also dive into imminent threat assessment methodology in the online space, and will include a case study from an imminent threat referral that led to a positive outcome.