I’m reading this and I’m thinking.... Isn’t this old news? I thought he died many years ago. I guess not.
I looked it up. He was 95 when he just died this week.
Possible scenario:
He was bedridden and reliant on her for food, medication, etc. She collapsed while in the process of bringing him his pills. He (and the dog) were left stranded and died from neglect (i.e. lack of food, water and/or medicine).