In the summer of 1993, teen friends Jennifer Ertman and Elizabeth Pena decided to take a shortcut home through a Houston park in order to meet curfew. They had no idea they would be walking into unimaginable horror. The girls stumbled upon a violent gang initiation - and never made it home to their families. Their murders shook Houston to its core and set new precedents for victims' rights. Hear from those who saw the case unfold - from family members to friends, investigators and attorneys. For the first time, one of the attackers also speaks from prison.