With respect to poachers, report them. Most states have a 24/7 anonymous tip line.
Having been through it, and through it a lot over the years, that may or may not be a solution. You can't just call up and say you got skunked this year and you suspect a poacher. Look at Andy's plight. His property is maybe not being poached directly. However, somebody next door might be taking a deer or two a month, year round. The problem and the solution is probably much more subtle.
Look at it this way: if deer are being poached here and there throughout the county, the remaining deer will just disperse and thin out to fill in the gaps. The source of the problem might be even miles away from Andy, and he sees it in a big way from one season to the next. The doe disperse in the summer, and they find underutilized habitat and move in. The bucks follow. The cycle repeats. All a guy needs is a salt-block and a .22 and a whole family can be fed off what gets taken in May and June. You can set one up under a light in the back yard. Meanwhile a guy like Andy thinks aliens have come down and carted off all his deer.
I'll throw another thing into it: otherwise law abiding citizens seem to turn a blind eye to poaching when it's going to feed a hungry family. Even when it gets to the magistrate, you probably are not going to see much more than a small fine. As a result, it ends up being a losing deal for LE to pursue.
Now for the kicker. I've called the tip line before. 3 years later the CO showed up. He'd been out at the local dam, looking for terrorists, and was just getting back to me. These guys were stretched out thin before 2008. Now, with record low workforce participation and record high food stamp enrollment, do you really think calling a 24 hour tip line is going to clean up an endemic poaching problem? Grandpa used to say that you don't kick a three-legged dog for running slow-- know what I mean?