(CBS NEWS) -- Nearly four decades after the unexplained drowning death of Hollywood star Natalie Wood, Los Angeles County Sheriff's investigators 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 one night in 1981, they say in interviews for "Natalie Wood: Death in Dark Water" to be broadcast Saturday, Feb. 3 at 10 p.m. ET/PT on CBS.
"As we've investigated the case over the last six years, I think he's more of a person of interest now," Los Angeles County Sheriff's Department Lieutenant John Corina says of Wagner in an interview with "48 Hours" correspondent Erin Moriarty. "I mean, we know now that he was the last person to be with Natalie before she disappeared."
Wood drowned off the coast of Catalina Island in California in November 1981 after she went missing from the Splendour, her family's yacht. Also aboard that night were Captain Dennis Davern, Wagner, and Wood's friend and fellow actor, Christopher Walken. The next day, the actress was found floating in the water wearing a red down jacket and flannel nightgown. After a two-week investigation, the death was ruled an accident.
But, in 2011, the Los Angeles County Sheriff's Department reopened the death investigation. And in 2012 the Los Angeles Coroner's Office amended the death certificate, changing the manner of death from an accidental drowning to "drowning and other undetermined factors."