The footage, recorded by a nearby witness, depicts two police officers pinning down Sterling before shooting him. Throughout the video multiple gunshots can be heard.
The video has caused a stir among Baton Rouge residents who have called for the arrest of the police officers who killed the 37-year-old.
"This is what lynching’s look like in 2016! Another murder in the streets because the color of a man's skin, at the hands of the people who they say will protect us." Kaepernick wrote. "When will they be held accountable? Or did he fear for his life as he executed this man?"
Known as the "CD man," Sterling has been described as a “laid back guy who would sell tunes and DVDs outside the convenience store where he was shot," according to CNN.
The autopsy revealed the cause of death to be multiple gunshot wounds to the chest and back.
The two officers involved are now in administrative leave and the Department of Justice has opened a civil rights investigation on the shooting.