Natalie Wood Natalie Wood

Authorities have amended Natalie Wood's death certificate to reflect the lingering uncertainties surrounding her drowning more than 30 years ago.

According to a copy of the death certificate obtained by The Associated Press, the cause of death was changed from accidental drowning to "drowning and other undetermined factors." The coroner's office also amended the death certificate to state that the reasons leading to Wood ending up in the water are "not clearly established."

Case closed: Investigators say no evidence of foul play in death of Natalie Wood