sad to hear and I could not help but notice he had stage 4 colon cancer. by that I would assume he had not had a colonoscopy in the past which can easily catch cancer early and very beatable when caught early.
if so a good chance he could still be here today.
have had 3 already since my dad had small cancer that was found during procedure, removed and he is fine. lot of people dont want to do it but it can save your life and you are asleep when they do it. even the liquid you drink now is not bad since its not as much as in the past, I think you can even take pills now to reduce the liquid intake. worst part to me is not eating all day the day before.