The release of this video footage comes amid increasing calls for Chicago Mayor Rahm Emanuel’s resignation over a possible cover-up after the fatal police shooting of another 17-year-old teenager, Laquan McDonald, who was shot 16 times by white police officer Jason Van Dyke more than one year ago. A new investigation by the Chicago Tribune suggests Emanuel may have known the details of the McDonald case far earlier than he’s admitted. The investigation shows Emanuel’s closest aides were concerned the McDonald case might create a political firestorm as early as December 2014. These aides and top police officials all began closely tracking the case. They also held multiple meetings with Emanuel over this time period. In April, during the mayor’s re-election campaign, the city agreed to a preemptive $5 million settlement with Laquan McDonald’s family after they obtained video footage of the killing.