Media is reporting that the autopsy that has determined her cause of death is completed. FYI - the autopsy begins with the scene investigation and concludes when the investigative reports, information, facts, evidence and autopsy findings (including toxicology and possibly microbiology) are done. So, no the autopsy is not complete and I doubt you will hear a cause or manner of death. To the living we owe respect, to the dead we owe the truth.
First mistake in a media story - 'Did she die of an accidental suicide'? FYI - It's either 'Accident' or 'Suicide', not both (if there is a question between the two with neither being more than likely than the other, that is 'Equivocal' and that is where our agency comes in and shines).
Hollywood has taken it toll of great talent over many decades, and it seems much more so over the recent years.