View Photo Gallery: A yacht captain said the actress’s husband, Robert Wagner, was responsible for her death 30 years ago, reopening a case that had been classified as a tragic accident.

An investigation into the death of Natalie Wood has been reopened because several sources have brought forth “credible and reliable” information, a L.A. County Sheriff’s Department detective said at a news conference Friday.

Lt. John Corina would not comment on who brought the information forth or what the information is. He said Robert Wagner, Wood’s husband at the time, is not a suspect.

The actress drowned 30 years ago this month while boating with Wagner and actor Christopher Walken. Her death was ultimately ruled an accident, which Corina reiterated several times was still the case. The circumstances surrounding her death are considered a mystery.

Corina called the anniversary date of her death “inconsequential” to the investigation.

Dennis Davern, the captain of the boat Wood, Wagner and Walken were aboard, said in an interview on “Today” that he lied about the investigation to police. Davern, the co-author of a book about Wood’s death, said he believed Wagner delayed the investigation intentionally.

Corina said Davern would most likely be interviewed during the investigation. He added, “I’m not concerned with the book.”

Wagner released a statement through his publicist Thursday: “Although no one in the Wagner family has heard from the LA County Sheriff's department about this matter, they fully support the efforts of the LA County Sheriff’s Dept. and trust they will evaluate whether any new information relating to the death of Natalie Wood Wagner is valid, and that it comes from a credible source or sources other than those simply trying to profit from the 30 year anniversary of her tragic death.”