Gunnery Sgt. Thomas Joseph Sullivan, 40, was killed on July 16, 2015, at the Navy and Marine Corps Reserve Center in Chattanooga, Tennessee, when a gunman attacked two military facilities that day. The attacker first struck a recruiting station, then drove to the reserve center on Amnicola Highway where Sullivan and others were fired upon. Sullivan, a veteran of two tours in the Iraq War and a Purple Heart recipient, is reported to have helped others escape and returned to assist more comrades before being fatally wounded; those actions were credited with saving lives.

The assailant, Muhammad Youssef Abdulazeez, was identified as the sole gunman and was killed in a gun battle with responding officers, ending the search for additional suspects. Sullivan’s family in Springfield, Massachusetts, and his fellow Marines remembered him as dedicated and beloved, and he was posthumously awarded the Navy and Marine Corps Medal for his heroism.

If anyone knew Thomas Sullivan or was at the reserve center that day and can add details about his actions or the timeline, please share what you know.