Hide in a ghilly suit with a paintball gun and light him up when he comes back. All the colors of the rainbow. That can't be a charge right? If he still comes back put those paintballs in the freezer. Escalate how covered up he gets till he gets the point. Or just get a camera that records offsite and call the cops everytime he trespasses. Start putting up pictures of him trespassing and stealing next to every mailbox around you. In the closest town put up the pictures everywhere. Make so he can't walk 5 feet without be recognized as "that guy".
Do this, people only get bolder when they arent punished