I think it's unlikely that people are leaving their deer in a ditch. But! You never know about people sometimes these days. The thought of it is prety sick to me. However, Cougar, I would tread very very lightly. Your actions on this will deffinately have a swift reaction and it may not be pretty. Check your sources again and again. Also, if you can find hard core, undesputable proof before doing anything.
Although what Davidmil is saying sounds like he is posting a defence. I would have to agree with him. The story of what these people are doing with their deer is just that....a story unless you have proof. One problem I see is that if you are sure of what they are doing then the right thing to do is not put it in the paper but make sure the authorities are on it in some way. If you do put it in the paper like that it would be slander which you could be sued for.
I hate that you are in this position. But, from what I've read in this and other posts your a very responsible person and will take a lot of thought before acting. Sorry your in this position.