My thoughts exactly. All this is just speculation, my own thoughts not fact. MM hired a forensic auditor for an audit of her finances, AM found out and an argument ensued. AM may have been impaired and grabbed a shotgun. PM might have jumped between his parents and being impaired AM pulled the trigger. I thought about the shotgun maybe being semi automatic where a finger on the trigger would cause 2 rapid fire shots before someone impaired by alcohol or drugs realized it. MM takes off running and he grabs something with an infrared scope because it's dark.
I think your scenario makes lots of sense. First of all, it's obvious that MM was contemplating divorce (at least to me and you, ha). She was very concerned about the source of their "lifestyle" and gets the forensic audit going. While the firm's records were not part of that, I wouldn't be surprised if the auditors gave a call to the bookkeeper/accountant desk of the firm, to make sure they had the right records (because it wasn't all adding up). All it would take is one person finding out about that audit and anyone in their right mind at the law firm would look into their own situation. How does $10M go missing? MM probably wondered where all the money was coming from - and perhaps she noticed that other lawyers in a similar position at the firm didn't seem to have quite the cash flow that she and Alex did.
Or someone else noticed the disparity.
I thought we heard early on that the bodies were found some 30-50 feet apart, which is consistent with your theory. I don't think we know if the shotgun was semi-automatic (I assume it would be).
At any rate, it's either 1 person wielding 2 guns (and perhaps having a practical reason, as you suggest, for switching - and perhaps being prepared for such an event; perhaps even trying to make it look as if it's a stranger attack) OR it's 2 people with 2 guns. LE's behavior makes me think they have dismissed the idea of a roaming pair of murderers (perhaps bent on property crime?) in the vicinity.
It could also have happened the other way. AM could have called MM down to the kennel area on some pretext, with PM trailing just behind (she may have had her phone with her).
I too am only
speculating. And there may really have been drug/alcohol impairment in the picture. We're hearing that no drugs or alcohol was found in Alex's blood at the hospital, but I believe that to be via his attorney (Griffin) and/or the podcast (which is likely a PR move).
He doesn't need to draw attention to more of his illegal behavior, but he's definitely in a delicate and ticklish legal situation...