Journalist Adam Shand reports on a chance discovery of human remains on a beach in 2011 that sets the NSW Police Force and forensic scientists on a nine-year quest to learn the identity of the individual and the circumstances of their death. The investigation opens the door to an incredible story of five mariners lost at sea in 1979. Finally, after decades of wondering, a family will find an answer and closure.             Episode 1: A human jaw bone washes up on a beach in northern NSW in 2011. For nearly a decade, the identity of the owner remains a mystery until the NSW Police Force finds a living relative through familial DNA technology.   See omnystudio.com/listener for privacy information.