Youve been hogwashed. theres nothing wrong with leaving a deer go over nite especially as cool as it has been the last few nites. Sure theres going to be a pungent smell if you leave it over nit, usually this is caused by blood, in your case it may have been gut rot. Sounds to me this guy was just plain out lazy. As a former profesionalbutcher, I have seen many many deer in m,y life and many had been left over nite. In my years of butchering deer I think out of thousands of deer i have butchered, ive only tossed 2 out out, thats because some idiots, left the damned things hang in a tree with hide on, out in the sun in 70deg temps for 3 days. The smell was enough to make even the stongest of stomachs toss their lunch not to mention the pretty bright green color of the meat.