Davern alleged that Wagner was responsible for her death.
The autopsy found that Wood's blood alcohol content was 0.
Representatives of international media, photographers, and members of the public tried to attend her funeral, but all were required to remain outside the cemetery walls.
Detectives instructed the coroner's office not to discuss or comment on the case.
In her youth, her mother had dreamed of becoming an actress or ballet dancer.
Kazan cast Wood as the female lead in Splendor, and her career rebounded.