Protestors call for justice as Birk resigns from force
Seattle Police Shooting
A protestor dressed as Uncle Sam shouts into a megaphone during a night-time protest march against Seattle Police Officer Ian Birk, Wednesday, Feb. 16, 2011, in Seattle. Birk, who fatally shot Williams on a downtown street last year, resigned Wednesday, after the King County prosecutor said earlier in the day that no charges would be filed against him. (AP Photo/Ted S. Warren)