After Natalie Wood's body washed up on an island beach Nov. 29, 1981, the Los Angeles County coroner quickly concluded the 43-year-old actress's death was an accidental drowning. The sheriff reopened the investigation in recent years and her death certificate was revised with the cause of death listed as "undetermined." Crime Stories is presenting a series of interviews with those responsible for re-heating this cold case. This episode features Lana Wood, the younger sister who has never given up finding justice for Natalie.