One thing. There was a doggie door. But I don't know if a dog would be savvy enough to realize they needed fresh air and quickly.First, IMHO, the dogs would be the first to succumb to CO poisoning. Due to a mutation in aryl-hydrocarbon-receptor gene, humans may be more resistant to products of incomplete combustion as opposed to animals. It has nothing to do with height, just physiology. Dogs would probably succumb first. Unless something led to the door being open so that they could run out.
Now, very old and infirm people are more sensitive to CO than younger and healthier ones. For some reason, I am not sure it was CO.
Nor do I believe that a 95-year-old man would have the capacity to commit suicide. It involves certain planning and energy. Doesn’t seem like Gene had it, judging by his last photo.
It is another thing that his wife, observing him slipping, might have developed “caregiver’s depression”. Sadness, genuine fear observing your partner getting so old and more dependent on you, loneliness, after all.
The worst situation could have happened if Ms. Arakawa herself got certain diagnosis that could potentially leave little hope. Then, the thinking pattern would have been about her husband and the favorite dog not coping alone.
While I can’t exclude some form of murder/suicide, it might have been a better way out. Mr. Hackman was still of limited mobility. I am sure that given their difference in age, such an outcome might have been discussed among them long before. From what I read about Gene, he wouldn’t have been constrained by strong belief.
RIP, Mr. Hackman and Ms. Arakawa. Gene was an amazing actor. Talented, but also funny and witty. He was so popular. He chose good movies. He disappeared from the screen quietly. He lived twenty more years, wrote books and as it seems, enjoyed life in New Mexico with his wife. He was a respected, decent man.
Anyway I don't think it was CO. jmo