This is a developing story. Last updated 4:15 p.m. ET
Officials say a gunman shot and killed five police officers Thursday at a Dallas protest against police shootings of black men, in a bout of violence that didn't end until the suspected gunman was killed by police using a "bomb robot."
The suspect, who died in a parking garage, was named Micah Xavier Johnson, federal officials told NPR on Friday. Johnson was a military veteran who had served in Afghanistan, and told negotiators he was upset about police shootings and wanted to kill white police officers.