If she committed suicide, the rest of it including the missing gold jewelry becomes a hoax...
Not necessarily. If she OD's either intentionally or unintentionally, it would have been from stress. She could have just wanted one good night's sleep. Let's say she saw the amytrip at the horse ranch and just assumed it would be the same dosage as her old RX, and took some, not realizing it was up to 6 times as strong as what she had.
I think there's clear evidence of a peeper the first 10 days or so. After that the incidents change and the main witness is Mom. Maybe mom was so scared she was jumping at everything. Perhaps the "friends" down the street found out why the police were there so many times and decided to have some fun with the family. Tag teaming the family. Perhaps they even heard they were suspects and were getting even. Regardless, after the first 10 days, the focus seems to be the mother, not Morgan. At least so far. We still have days to wait for the rest of the story.
My concern is that at this point, Mom probably will never believe it was anything but murder. As a parent, I can understand that. I would want there to be some explanation other than an accidental overdoes, especially after the build up, maybe even work up) over a stalker. But, so far, there really hasn't been anything to connect the perceived stalking with Morgan's death. That doesn't mean hoax; just a very strong desire to make sense of what happened, and perhaps not think that one's own hysteria may have contributed.
This is all just my opinion, of course.