That was my thought. I've only seen one dead body and his face was purple after being slumped over for many hours. (Not a violent death) It definitely gave crediblity to me...but I don't know enough as to what happens to blood and such at death.
Also, by fingering 4 of the players in this case, he was not putting himself in the safest position on the island. He is all but begging for one of those close-fitting neckties. I hope they can keep him safe.