Los Angeles County homicide detectives have named actor Robert Wagner a "person of interest" in the probe of the unexplained 1981 drowning of his wife, actress Natalie Wood, saying he was the last person with her before she vanished off Southern California.

The latest twist in the mystery surrounding Woods' death came in on-camera interviews of two investigators from the Los Angeles County Sheriff's Department by CBS News for a segment of the program "48 Hours," set to air on Saturday.

Excerpts of the interviews were released by the CBS network on Thursday ahead of the broadcast.