hey, everyone, good morning. i m reena ninan. i m richard bacon. we begin this half hour with another day of angry protests on the streets of zmeek demonstrators marched toward police headquarters calling for the resignation of mayor rahm emanuel over a growing police scandal and allegations of a cover-up. but the mayor give is refusing to step down. here s abc s kenneth moton. reporter: another evening of protests in the streets of chicago. the cities embattled mayor rahm emanuel in apology mode as he grapples with a growing police scandal and allegations of a cover-up reaching to city hall. i take responsibility for what happened because it happened on my watch. and i m sorry. reporter: the mayor is at the center of the firestorm following the recent release of dashcam video showing 17-year-old laquan mcdonald walking away from jason van dyke who opened fire hitting the be critics have repeatedly accused the mayor of keeping the video under wraps till he secured h