Three people who are in attendance know that their own child has been killed by someone else. Through all of this violence, these leaders had never sat down together. It took them about an hour to get each side clear about their needs and to get the other side to hear them. And what got in the way was just endless sparks of yelling and accusations. But if we can learn how to talk to each other in this way, we don't have to kill each other," Marshall says.