It’s been nearly three years since Trayvon Martin was killed by George Zimmerman. Since then attacks on Black citizens by law enforcement officers (or, in Zimmerman’s case, those fancying themselves as such) have continued, seemingly without cessation. The latest such incident happened just this week, when footage of a South Carolina police officer manhandling a teenage female student in a classroom surfaced. Throughout these events, Talib Kweli has been a steadfast champion for the people, whether it was standing on the front lines in Ferguson, MO after Michael Brown was killed by a police officer, or releasing songs designed to make #blacklivesmatter a movement, not a motto.

Talib’s latest verbal fist in the air comes by way of the Nottz-produced, “Which Side Are You On?” The song is a call to action for “justice for us all” and features Tef Poe and Kendra Ross. It will be included on Talib’s forthcoming album with 9th Wonder, titled Indie 500.

For the video, Talib and 9th have released a mini-documentary, in recognition of October 22 as the 20th National Day of Protest to Stop Police Brutality. Documentarian Sama’an Ash travelled to Ferguson in August for the commemoration of Mike Brown’s murder and the Ferguson uprisings, and has used film from the event to provide visuals for “Which Side Are You On?” The powerful video also contains news footage of some of the atrocities committed by police against citizens over the last several years, as well as shots of individuals like Common, Bun B, Cornell West, Tom Morello, Pharoahe Monch, M-1 of dead prez and more, in the field protesting with the people. It’s clear where they stand on the issue of police violence and excessive force.

Related: Talib Kweli, Rapsody & 9th Wonder Reconsider The Meaning Of “Ghetto” (Video)