First of a two-part examination of the 1998 disappearance of Elgin mother-of-two Arlene Fraser, highlighting her family's unbreakable determination to uncover the truth. What began as a missing-person report rapidly escalated into one of Scotland's most complex and high-profile investigations, but no-one could have foreseen the labyrinth of twists that would follow. With contributions from detectives, media and family member's including Arlene's sister Carol Gillies