The Showtime documentary will examine the 17-year-old’s murder at the hands of the Chicago Police Department and the subsequent cover-up.

The rapper’s new video, which premiered as a Tidal exclusive this weekend, features snippets from the video of Laquan McDonald’s death at the hands of former Chicago Police Department officer Jason Van Dyke.

Chicago Police Department Superintendent Eddie Johnson recommended that they be fired for filing false reports that contradict the infamous video of former officer Jason Van Dyke killing McDonald.

The Chicago MC premiered the track on Ebro Darden’s Beats 1 radio show last week before it appeared on his surprise EP, “There’s A Lot Going On.”  

Mensa premiered the song—named for the number of times Chicago police officer Jason Van Dyke shot Laquan McDonald—at Blackout for Human Rights’ #JUSTICEFORFLINT event.