The full story is at http://law2.umkc.edu/faculty/projects/ftrials/trialheroes/doaressay.html
"Into the no-man’s land between the police and the rioters walked John Doar. The crowd stopped for a moment, stunned as though they were watching a ghost. Then bottles, bricks, and other missiles began crashing around him. Doar called to the crowd. “You’re not going to win anything with bottles and bricks,” he said. He could hardly be heard above the roar of the crowd, which began to encircle him. A man with a tire iron lifted it and took aim at Doar’s head.
An angry black woman yelled in his face, “We get our rumps shot up!” She asked with sarcastic disgust, “Are we gonna wait for the Justice Department?” Doar pleaded, “Aw, give us a break.” Then he shouted again, “Hold it! Is there someone here who can speak for you people?” One black youth emerged from the demonstrators and joined Doar in the street. “This man is right,” the youth said, pointing at Doar.
“My name is John Doar—D-O-A-R,” the official called again and again. “I’m from the Justice Department, and anybody around here knows I stand for what is right.” He walked toward the mob, shouting—begging—for the crowd to disperse. “Medgar Evers wouldn’t want it this way,” he called.
In an alley, a CORE worker grabbed a teenager with a rifle who was taking aim at Doar. “Hold hands with me and help us move these people along,” Doar said to some nearby protesters. A few people linked hands and they slowly began to push the mob back from the police line. A massacre was averted. Barricades were removed and a motorized streetsweeper began whisking up the broken glass and other hurled debris."