ousands of protesters condemning police violence marched through St. Louis on Saturday, during a weekend of demonstrations organized after the fatal shooting in August of an unarmed black teenager by a white officer in the suburb of Ferguson. After a 1/2-mile march through downtown, protesters gathered for a rally at Keiner Plaza organized in part by Hands Up Unite, an activist group that emerged after the Aug. 9 shooting of 18-year-old Michael Brown.