Those feelings were exacerbated in late 2015 after the court-ordered release of a video showing white Officer Jason Van Dyke shooting black teen Laquan McDonald 16 times as he walked away from police with a knife in his hand. The furor over the shooting sparked a political crisis for Mayor Rahm Emanuel and led to a push for reform of the Police Department after a scathing report by the U.S. Department of Justice found that officers were poorly trained and quick to use excessive and even deadly force without facing consequences.