A group of anti-cop dissenters burned an American flag outside a Staten Island police station house in protest of the NYPD’s investigation into the death of a black teenage boy who police said suffered a fatal asthma attack after a gang-related street fight last month, video shows. In a video posted to YouTube, demonstrators can be seen gathered outside of the 121st Precinct station house for the staged flag burning on Saturday. “We light fire for the ancestors who have gone before us who were lynched,” a woman can be hearing saying in the video as another person attempts to...