After a third night of violence and unrest in St. Louis, about 100 protesters marched in silence along downtown streets Monday during the morning rush hour. Once they reached City Hall, the silence gave way to chants for justice. The city has been marked by protests since Friday, when former police officer Jason Stockley was acquitted on charges of murdering a black motorist after a police chase in 2011. Stockley is white. Overnight Sunday, police arrested more than 80 people after a peaceful protest turned violent as night fell. In a concentrated area downtown, some protesters smashed windows and overturned...