unrest in two major cities, as hundreds of protesters returned to the streets. >> new york city police department. >> [ bleep ]. >> reporter: from chicago to new york, demonstrators marching in frustration, over the shocking death of 17-year-old laquan mcdonald. >> violation of new york state penal law. >> reporter: police arresting several protesters in new york city. their passion spilling into the macy's flagship department store, in the heart of manhattan voices raging. in chicago, demonstrators stage a sit-in blocking a major intersection. some trying to take police officers' bikes. >> reporter: this, as newly released dash cam video, obtained by "the chicago tribune," captured the moment before and after 37-year-old jason van dyke shot mcdonald 16 times last october. this is officer van dyke's own vehicle dash cam, while out of