Authorities have called actor Robert Wagner a person of interest in the 1981 death of Hollywood star Natalie Wood.
Los Angeles County Sheriff's investigators told "48 Hours" that Wagner, who was Wood's husband at the time, is a person of interest in the investigation into the former Hollywood star's mysterious death, CBS News reported.
"As we've investigated the case over the last six years, I think he's more of a person of interest now," Lieutenant John Corina told correspondent Erin Moriarty. "I mean, we know now that he was the last person to be with Natalie before she disappeared."
Woods reportedly drowned off the coast of the Catalina Island in California in November 1981. She had gone missing from her family's yacht. Captain Dennis Davern, Wagner, and fellow actor Christopher Walken were aboard the ship at the time.
Woods was found floating in the water. Her death was ruled an accident after a two-week investigation. Wagner, Davern and Walken all reportedly told detectives that Wood had left in a small boat and gone ashore.
The case was reopened in 2011, and her death certificate was amended in 2012. The manner of death was changed from accidental drowning to "drowning and other undetermined factors."
But investigators now say that Wagner and Davern's accounts of that night have shifted. They added that Wagner has refused to speak with them since the case was reopened. Corina believes Wagner is not telling the whole story.
"I haven't seen him tell the details that match ... all the other witnesses in this case," Corina said of Wagner. "I think he's constantly ... he's changed the -- his story a little bit ... and his version of events just don't add up."
New evidence and new witnesses have led to new theories about what could have happened that night.
"The statements from these new witnesses differ from the original version of events as related by previous witnesses, including the individuals on the boat," the sheriff's office said in a statement, CNN reports.
Detective Ralph Hernandez added that the autopsy report stated that Wood had several bruises on her body.
"She looked like the victim of an assault," Hernandez said.
When asked if he believes Wood was murdered, Corina said there is some speculation.
"I think it's suspicious enough to make us think that something happened," Corina said.
"We have not been able to prove this was a homicide. And we haven't been able to prove that this was an accident, either," Hernandez added. "The ultimate problem is we don't know how she ended up in the water."
Walken has reportedly spoken with investigators.
The "48 Hours" episode, titled "Natalie Wood: Death in Dark Water," will air on Feb. 3 at 10 p.m. ET/PT on CBS.