six years, around police violence and vigilante violence happening to both black communities and communities across the country. >> every movement, social movement, has ebbs and flows. certainly there have been various periods in the start of the black lives matter moves that grew out of police shootings. they did seem to be out of the headlines for quite a while. now they're back in. how do you make this moment count? how do you say to the -- stephon's family, this isn't going to be just his death, this is going to spark change. what do you do? >> first and foremost, i think when it comes to families of folks that have been impacted by police violence, this -- and you would hear folks like trayvon martin's parents and jordan davis' parents talk about how they're joining a community in which they hope to never have to