St. Louis police chief says `` acts of violence will not be tolerated '' Grand jury weighing evidence to determine if Officer Darren Wilson will face charges . Many parents received notice to fetch their children from school if the decision comes out earlier in the day . The grand jury's decision is expected by the end of next week and could lead to a federal civil rights investigation into whether Ferguson Police Department officers used excessive force against Michael Brown, 18, who was fatally shot Governor has declared state of emergency ; mayor has told police to prepare for worst .
St. Louis police chief says `` acts of violence will not be tolerated '' Grand jury weighing evidence to determine if Officer Darren Wilson will face charges . The grand jury's decision is expected by the end of next week and could lead to a federal civil rights investigation into whether Ferguson Police Department officers used excessive force against Michael Brown, 18, who was fatally shot Governor has declared state of emergency ; mayor has told police to prepare for worst .