Stop in for a cup of coffee

I have owned this property for 36 years I had a running streak of 25 years straight. Then they built a house just past the property line so I moved my stand over but that neighbor who owns 2 acres of woods sits on my line and kills 3 or 4 a year. He was turned into the Game Commission but they did nothing. Then the other night sitting in the middle of my 20 acres I had one coming my direction and then someone shot it with a muzzle loader. 20 acres is not big enough anymore
Man Tike that would irk me. Likely nothing you can do but at some point you would think general good ethics and good neighbor protocol would prevail?