As media coverage of police shootings intensified, protests erupted in the wake of the July 5, 2016 shooting of Alton Sterling in Baton Rouge, Louisiana, and the July 6 shooting of Philando Castile in Falcon Heights, Minnesota. On July 7, towards the end of one of these protests in Dallas, Texas, Micah Xavier Johnson ambushed and fired upon a group of police officers, killing five officers and injuring nine others. Two civilians were also wounded. Johnson was an Army Reserve Afghan War veteran who was reportedly angry over police shootings of black men and stated that he wanted to kill white people, especially white police officers. Following the shooting, Johnson fled inside a building on the campus of El Centro College. Police followed him there, and a standoff ensued. In the early hours of July 8, police killed Johnson with a bomb attached to a remote control bomb disposal robot. It was the first time U.S. law enforcement used a robot to kill a suspect. The shooting was the deadliest incident for U.S. law enforcement officers since the September 11 attacks in 2001 and saw a massive uprising of public support for U.S. police officers in the form of the Blue Lives Matter movement.