Brent Alan Thompson, 43, was a police officer with the Dallas Area Rapid Transit Police Department who was killed on July 7, 2016, during a downtown Dallas protest organized in response to the fatal police shootings of Alton Sterling and Philando Castile. While officers were providing security for the march, a sniper opened fire; Thompson was one of five officers fatally shot. The shooter was later identified as Micah Xavier Johnson, 25, a former Army reservist, who was cornered in a nearby building and killed when the Dallas Police Department’s Bomb Squad used a robot to detonate an explosive device.

Thompson had served nine years with DART Police and was a U.S. Marine Corps veteran who served in Afghanistan and Iraq. He is survived by his wife, Emily Thompson, a DART officer, and six children. The incident prompted an extensive investigation that concluded Johnson acted alone and had expressed a desire to target white police officers.

If anyone knew Brent Thompson or has information about his service, family, or that day, please share what you can.