Today marks four years since the mass shooting at the Capital Gazette newspaper in Annapolis, MD, in which the suspect had issued threats against the newspaper prior to carrying out his attack, highlighting the importance of monitoring threats on social media.

At approximately 3:00pm local time on June 28, 2018, 38-year-old Jarrod Warren Ramos shot and killed five people and injured two others at the Capital Gazette newspaper in Annapolis, MD. Reports state that Ramos’ Twitter account included mentions of Capital Gazette a total of 149 times out of the account’s 876 tweets, including references of previous attacks against journalism outlets in conjunction with threats against Capital Gazette.

The anniversary of the 2018 shooting highlights the connection that is often apparent between violent or threatening social media activity and violent acts, and the importance of considering red flags and patterns of behaviors from potentially violent individuals.