A car was involved at some point, to transport the body, or the killers. I'm trying to get you to admit that even a professional killer/butcher would be desperately concerned about evidence. Any dismemberment, in any condition, would leave an unmanagable DNA trail, even if it were done at a car wash, in a lake, or under a waterfall. You have no idea.
Equally silly are the suggestions that anyone would risk further relocating, rearranging, or manipulating the remains after it was dumped. Why would any one risk the exposure, if they could be connected to the crime?
This crime is believed by most to have been done by men trying to protect themselves from discovery and exposure in the first place. They would do nothing which would increase the risk of getting caught.
More dearly than you, even, I would like to use occam's r. and cut out some of this, but again as I told another poster, I am being mugged by facts. Facts I take as facts.
If at some point I learn the facts (incl saw marks) are not fact, I will be the first to post it to you.