Book excerpt: The development of DNA technology furthers the search for truth by helping police & prosecutors in the fight against violent crime. Most of the individuals whose stories are told in the report were convicted after jury trials & were sentenced to long prison terms. They successfully challenged their convictions, using DNA tests on existing evidence. They had served, on average, seven years in prison. By highlighting the importance & utility of DNA evidence, this report presents challenges to the scientific & justice communities. A task ahead is to maintain the highest standards for the collection & preservation of DNA evidence.