Also, I just noticed that in the nighttime picture the deer's ears seem to be drooping down. In the day time picture, they are angled higher up. It may just be the angle, but I don't think that deer had stiffened up based on what we can see in the nighttime pics. Seems to be a relatively fresh kill.

I hope he killed it legally though. And I hope we find out the truth about it sooner or later. I feel bad adding to the skepticism, but the pictures are the only real evidence to go on.