FILE – In this Feb. 10, 2011, file photo, St. Louis County Prosecuting Attorney Bob McCulloch speaks in St. Louis. The coming days and weeks will be crucial as grand jurors began hearing evidence that will help determine whether Ferguson police officer Darren Wilson is charged with a state crime for the Aug. 9 shooting of 18-year-old Michael Brown. The states case is being overseen by McCulloch, who is white, and remains in charge despite mounting pressure to step aside from some local residents and black St. Louis area officials who believe he cannot be impartial. (AP Photo/Tom Gannam, File)