At some point here, you may have to do something illegal. It sucks, but the cops are obviously not going to help you. The rippers have already killed your dog, and are now trying to break into your house. I wouldn't be surprised if their next step is to poison or hurt you. Did you tell the cops that your dog was killed? Did you report the latest break-in attempt? These are things that they can't ignore, even if you are breaking a few city ordinances. If you aren't willing to protect your home with a weapon, your best bet may be to just give up the rest of the harvest. If casey anthony, could get a not guilty verdict, I'm sure you could get away with some shit too. Usually if there are no witnesses it is hard to get a conviction.