Nearly four decades after the unexplained drowning death of Hollywood star Natalie Wood, Los Angeles County sheriff's investigators speak for the first time and tell 48 HOURS that her then-husband, actor Robert Wagner, is now a person of interest. Investigators want to speak with Wagner about the circumstances surrounding her death that night in 1981, they say in interviews for 48 HOURS.

She was 19 with an allegedly abusive boyfriend – did he make her an unwitting accomplice to murder? CBS News' Jim Axelrod investigates.