Oh my, I have been gone a long time! Criminal investigation? What criminal investigation? I thought ANS died of natural causes...
Why did you think she died of natural causes? Such a conclusion was never announced. Did you dream it? Did somebody you know tell you that? What on earth???
She died from having too many drugs in her system. There were several, but the one that seems to have been the final straw was way too much of a drug called chloral hydrate...a sleeping potion that is seldom prescribed anymore but used to be in the olden days. Marilyn Monroe had taken too much of that same drug.
The police claim they aren’t investigating anyone criminally, and the medical examiner called her death “accidental”. However, there is much, much more to the story in the opinion of virtually everyone who regularly posts here and millions of other people besides.