I think this landfill witness is extremely credible, most especially when he said the body was PURPLE. Who, just wanting some attention in this case, would think of that detail?
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.