I don't think the question of his death has ever been resolved. The official explanation is that he fell and hit his head. And at 258 Lbs, he clearly was not on his own diet.
Recent evidence shows that fat can function as an endocrine organ and produce something that acts like insulin. And when you produce too much insulin like I do, carbs consumed are quickly converted to fat. So it becomes a vicious cycle. I have an unusual variant on metabolic syndrome and have had it my whole life. But the more typical form is increasingly common in adults, and this all goes back to blood sugar and obesity. So one has to wonder just how many people might benefit from a low-carb diet.
I was never able beat the weight gain problem until I went Atkins. So I have to think this notion that it is simple matter of calories is at best selective. Maybe for some people, but I reject that claim 100%. When I went on this diet, I was still eating 1500 calories a day, but I was shedding weight so fast that it scared my wife.