A Los Angeles County sheriff's spokesman said there is no compelling evidence to change the conclusion that her death off Catalina Island in 1981 was an accident.
But officials said cold cases like Wood's are never really closed and they are still looking at some parts of the case, which was reopened in November after several sources came forward with new information.
Wood died sometime after the evening of Nov. 28, 1981, when the 43-year-old actress was boating off Catalina Island with her husband Robert Wagner and her "Brainstorm" costar, Christopher Walken.
The Associated Press contributed to this report.
