(snipped)
Anyway, my thoughts are to try figuring out in the following order:
1. What actually killed her. That includes how much of the drugs she would have to take, whether it was the effects of the drugs or a complication (pulmonary edema, etc.)
I believe that the ami was of a high enough "dose" to kill her without anything else. However, there is the presence of a muscle relaxer (flexeril) and a benzo (dalmane), both of which would be "adjuvants" or boosters of the ami. Ami tox killed her, imho, and the pul. edema was a result of the drug overdose (left side heart arrhythmia often leads to pul-edema, and should be considered as a primary s/e in this case, again imho)
2. How the drugs got into her system. This means - why were there drugs in her blood and stomach but no fragments, no 'stomach contents' (it was stated that the stomach was empty), no injection sites (as far as TI knows), no drug paraphernalia, empty bottles, etc. in the room.
it is my belief that she was either injected or the drug was in liquid form and ingested. As there was no thorough examination of the body post mortem (e.g. a rape kit, the nail polish was left on, et cetera), I suspect that there was at least one injection of ami. If it was ingestion, it was in liquid form, and the flexeril was in pill form. I don't know enough about the dalmane to venture a WAG as to it's form or how it got into her body.
3. Why the dogs didn't react that night.
Morgan's mom believes that Tessi, the Newf, was reacting to something based on her body language and refusal to come to bed. Tessi was brought to bed in any event, and the door to the parents' room was closed. Morgan's puppy was still pretty young, 5 months old, and likely would not have been stranger aggressive with all the places Morgan took her (e.g. proper socialization), and further if Wylah is an Aussie sheep dog (as I believe she is), then there is no protective instinct towards humans, and even if there were, the puppy was too young to do much of anything.
Furthermore, I believe that Wylah knew the person who was in Morgan's room that night.
4. How someone could have entered her room that night without being seen or heard, and without leaving any kind of evidence.
in the garage, come in through the sliders in the back, or had a key. It's not hard to not leave evidence if you're prepared, and it's even easier to "not leave evidence" when there's no investigation (e.g. no taking the bed clothes, evening outfit, toothbrush, et cetera) that was done.
5. Why nobody, other than the deer, was caught on film that night.
We don't know that. There are video tapes which Morgan's mom talks about, wherein a person is seen behind cars, running down a street, and so forth, but I don't know the date/time of these. I don't know if there is inconclusive video of that night. And I think the fawn photo is a sentimental photo, and should not be used to judge whether there was or was not a photo taken of the stalker/murderer.
6. Why the stalker would choose that time and method to kill her.
In most cases of stalker murder, there is a stressor/precipitating event; I don't know for sure what it was in this case, but I'd suspect that it had something to do with the coming "talk" with LE the next week with a potential suspect, and/or some dynamic in a group relationship of which we are as yet unaware. But there was a precipitating event, of that I'm sure.
7. What made her last day different from those before it. That would include the lack of appetite, the preparations for going out, not responding to texts, losing her temper with TI, etc.
I don't believe we have that info yet.