Anita Alvarez

The ex-Chicago police detective who shot and killed 22-year-old innocent bystander Rekia Boyd, is seeking to collect disability pay from the city because he says he suffers from post-traumatic stress disorder from the 2012 shooting. Dante Servin, 48, could collect as much as $78,000 or 75 percent of his former $104,000 salary until his police pension kicks in.

Arguing that the sole job of Chicago's top prosecutor is to disproportionately lock up African-American men, ColorOfChange worked overtime on Tuesday's primary to oust Cook County State's Attorney Anita Alvarez, who is up for re-election.

The investigation will examine police practices used in the October 2014 shooting of Laquan McDonald and dive deeper into other police shootings, training and the use of deadly force.