Let's say a patient is gravely weakened, in irreversible decline, and has an underlying medical condition which is basically untreatable at this point. That person should not be tormented with futile treatments, "heroic" interventions, chemo, radiation, surgeries, etc. which they can't tolerate and are just burdensome for no purpose.
That's when the focus of treatment has to shift to comfort-care: meds to control pain, agitation, nausea and the other symptoms of untreatable illness. Adequate food and water to keep comfortable; clean, hygienic, pleasant surroundings. Counseling and assistance needed for the main care-giver, too (like this poor husband) who may well be suffering from depression, stress, emotional trauma.
This was a bad death. Being shot to death by one's husband is bad. Why didn't both the wife and the husband have appropriate help? Who was the doctor? WHO LET IT GET TO THIS POINT?
Things happen.
I cry for the man.
Although I understand it.
For all we know...his wife begged him.
We will all meet death. How, is the question.
Sometimes you don't get good information from doctors and you don't know what else to do. My father's death from cancer had some bad days. At the time we didn't know better. In retrospect we could have done things differently and my father would have been more comfortable.