Did Veganism kill him?
I find it quite odd that Michael Clarke Duncan, such a seemingly strong and healthy man, died so suddenly, and shortly after becoming a Vegan. Such a radical change in diet can no doubt have drastic effects on your body, and it's no secret that Vegans often lack many key nutrients like Omega 3. I really think becoming a Vegan is maybe what killed him.
Article about Vegan Diet/Heart Health:
http://douglassreport.com/2011/03/02/vegan-heart-risk/