RE: Dang Poachers
Sometimes a $50-100 reward offered to an acquaintance of the suspects will get you a pretty good lead. Tell 'em that you promise you'll never mention his name as the source, and keep your promise. It really helps if you have a little dirt on the squealer, too.
Even if they don't go down, sometimes just a happy visit from the local game warden is enough to put a once brazen poacher's tail between his legs. If nothing else, he'll relocate his activities.
Is it possible that the deer were legally taken, just with the remains being littered onto your property? Guys around here have favorite carcass-littering spots, which is a peeve of mine. They put the hide, head and bones in a garbage bag, thinking that the plastic bag will magically disappear. I wouldn't care if they just tossed out the organic stuff.