If u have game cam footage then send him that pic via Facebook and tell him the wardens looking for u!!! I would msg him either way. If he's a kid he will be scared. No threats or anything. Of he has any respect he will apologize and tell u it won't happen again.
Might be the easiest way to get this fixed if you have a pic. If not, you probably gotta go the GW route.
If it was me and I wanted something done, I'd avoid all contact and let the LEO's handle it, especially since this individual according to the OP has a rep for this very thing. As far as anyone knows, the GW is already working a case involving this dirt-bag and you could inadvertently mess up his investigation. Do what you want OP, but Myself, I'd try contacting the GW again and just ask if he has an idea on a time frame and go from there.