The director was married to the Manson Family's most famous victim.
"Today, Manson's victims are the ones who should be remembered and mourned on the occasion of his death."
The judge said the court could not dismiss the 1977 rape case "merely because it would be in the victim's best interest."
Geimer said the prosecutors used the case to advance their own careers.
Three movies cemented Harrison Ford's fame beyond his sci-fi heroes.
Debra Tate, whose sister Sharon was killed in 1969, says TV shows depicting real murders are distasteful.
The "Rosemary's Baby" director is wanted on charges of unlawful sex with a minor.
The acclaimed film director is wanted in the United States for having sex with a minor.