"We know the names of black victims, Philando Castile, Oscar Grant, Sandra Bland, Sean Reed, Tamir Rice, Eric Garner, Mike Brown, it goes on and on, but we never know who killed

"We know the names of black victims, Philando Castile, Oscar Grant, Sandra Bland, Sean Reed, Tamir Rice, Eric Garner, Mike Brown, it goes on and on, but we never know who killed them," DuVernay told DeGeneres. "This invisibility allows us to tell a story that is incomplete. And so for me, that's a lot of what I've been thinking about in this moment, how we've allowed this sense of police invisibility, which leads to a lack of accountability, which is just one of many issues within our current criminal justice system that needs to be dismantled."