What was supposed to be a protest for peace was interrupted Thursday night with deadly gunfire that left five officers dead. Early Thursday evening, protesters gathered to speak out and march after videos emerged this week of two officer-involved shootings that led to the deaths of Alton Sterling, 37, in Baton Rouge, Louisiana and Philando Castile, 32, in Falcon Heights, Minnesota. The night began with protesters gathering at a downtown Dallas park and then marching through the streets. It ended abruptly when shots were fired, striking 12 officers and two civilians. Five of those officers were killed. This is how the night developed: 7p: Crowd of protesters gather to demand change in the wake of two-officer involved shootings. The protest began at 7 p.m. at the Belo Garden Park off Main Street in downtown Dallas. 7:16p: The protest begins peacefully with people chanting "enough is enough." Dallas police post video of the crowd: 8p Nearby El Centro College placed on lockdown as precaution prior to protest. 8:11p An hour into the protest, things remain peaceful. Dallas police post an image of Sen. Royce West holding hands with Major Lonzo Anderson: 8:23p Police post video as a mass of people marches eastbound on Commerce Street through downtown. 8:45p Dallas police post their last video of protesters at 8:45 p.m. 8:59p Just before 9 p.m., police report shots fired. 9:05p Video captures gunshots ringing out. Officers yell "active shooter" around area of San Jacinto and Griffin streets. 9:35p Police warn people to stay away from downtown as they search for suspects. At least one officer reported down. 9:40p Two officers reported down. 9:41p Police clear out the Bank of America building, the tallest skyscraper in Dallas. 10:23p DART police reports four officers shot, including one dead. The deceased officer was later identified as Ofc. Brent Thompson, 43. The update brought the total number of officers shot to six. 10:29p Chief David Brown reports 10 o

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