A riveting new PBS documentary, "15 to Life: Kenneth's Story," traces one young man's quest for release from prison after he was sentenced to four consecutive life terms without parole. JJIE speaks with the documentary's director, Nadine Pequeneza, about the making of the film, Kenneth Young's case and how his experience is emblematic of a juvenile justice system struggling to find a balance among rehabilitation, modern behavioral science and the United States' "tough-on-crime" culture. Young is just one of the more than 2,500 people convicted as a juvenile that are now serving life sentences in the United States.