RE: Land lease already a problem!
Make sure they did in fact shoot them on your property and confront them. Talk to the party you are leasing the land from and let them know that people have been trespassing during your lease and that you don't feel like you should have to pay the same amount as you were paying. Just a thought I guess, maybe come up with something better to tell them. It's hard to keep people off your property sometimes, especially when they know there are monsters back there and you may do nothing to prosecute them.