I have a good friend who shall remain nameless. He had a cat that was raiding his pigeon coop and doing a lot of damage to his birds. One night he heard a comotion in the coop and slipped out the door with his pellet gun. As the cat was exiting the coop he dropped it with a well placed pellet to the head.
At that point he realized it was his next door neighbors cat. He didn't know what to do so he took the cat out into the street in front of his neighbors house and ran its head over with his truck. Problem solved.