The dog probably died of lack of food and water if it was shut in a crate or a closet. It sounds to me that she must have had a collapse or heart attack and he died from a fall and not having her there to take care of him.
I think it is likely the dog was shut in and couldn't get out and was probably frantic as well until dying. I hate thinking of it.
It would SEEM he died of cardiac event but I'm not sure on her, or that they were even the same day. The dog I'm not sure of either, actually we can't be sure of anything. Although I believe he'd have been in bad shape after so long, not sure he'd be dead. BUT that's also IF that's what he died from, lack of food and water. I can see someone taking their dog with them... And in fact just heard a profiler, John Kelly, saying that's far from unheard of.
She is definitely a possible suicide imo. I mean there could be coincidences but I don't think I buy into they both had falls or cardiac events in the same time frame.
I don't want to accuse either of them of anything as there's absolutely no reason or fact to do so. However, I would assume she was in charge of his care, I mean he was 95 and she's in her 60s and accounts are that she made him follow a fairly strict and healthy diet and so I don't think that's a leap at all. My mom was younger than my dad and she saw to almost everything when he was in her 80s and she younger, and his health was iffier than hers.
So on that note could she have missed a med he needed and felt guilty? Or she found him dead and then she committed suicide and took the dog with her?
Likewise could he have found her dead? And he was going outside or some such for help? One would think you'd call but hard to say if a closet neighbor or someone he'd turn to, I mean they were "private" people. Maybe he wouldn't rush to have such known. And then he is old enough and has heart problems he could have had a cardiac event after finding her...
I also again am not accusing and there's absolutely NO reason to but I don't think it can be ignored or not looked at that he was worth 80 mill. BOTH of them are dead. That's a major estate. She is a second wife but they have been married a LONG time and so it's very likely if she is not the sole beneficiary, pretty sure more likely both her and his adult family are provided for. Two gone though would put it all to the other heirs OR if it all went to her, it likely would have been done that way if she was passed.
Again, there's NO reason to think this so I want to make it clear I don't think that nor am I accusing anyone as I know nothing about the family at all but you know, even a spouse married in or an adult grandchild who knows...
I just don't think his net worth should be ignored and all bases covered.
Now finally what other than carbon monoxide might explain this? Here is one we haven't covered I don't think and that's poison... Just as an example if someone put something in food in the frig... Let's just say in water. Then the dog's bowl was filled with that water. Then she drank some from the same source later. Then he did an hour later... All would die but die at varying times perhaps but close to the same time...
Finally the dog. Why was this dog dead and not the other two. Was this dog kept in the house or in the bedroom or treated differently, more of a house dog perhaps? Or two were his and one hers again? I'm just saying this dog may have had a treat from the frig as it's more indoor pet perhaps than the other two or some such...
She eats something and gives the dog a bit of it... Then he does. Could even be dinner.
Honestly I think they definitely need to look for all poisons in the tox. It would explain things well just as carbon monoxide would have...And for a perp, so ideal in the sense they both die but in different areas making it hard to figure out... Perp may not have even planned on the dog, food was simply shared with the dog, or water filled from the same source or some such...