revolution in human identification. the first step is to get dna tested. someone like paul needs to get tested at a consumer dna testing company and compare it against the millions of others in those data bases. >> so you say in the film people don't have necessarily a right to have a relationship with their biological family but they do have a birth right to the knowledge of their heritage. talk about that. why it is so important. >> alex hayley talked about that yearning, that need to know who we are and where we came from, our roots. i've seen that with millions of people now with the advent of direct consumer dna testing and genetic geneology. i'm not saying everybody cares about that but there are millions of people who yearn for answers about their self-identity questions, family mysteries, answers in violent crimes.