Just shoot him and put a "throw away" weapon in there hands and claim self defense! Just kidding NOT a good idea. The best way to deter theives is to keep things from looking tempting by locking everything up. I learned the hard way too, we use to live more "down town" more so then now and our block was surrounded by not so nice areas and the riff raff would walk by every day and one night I heard something around my trailer but could not wake up enough, well the next day I saw a trimmer gone. So the next night I set him/them up waiting for them all night. They finally showed up about 3am and they got a surprise to say the least! Me running around the corner with a 8 iron in my hand yelling and screaming. This kid I swear sh!t his pants and was like a dear in headlights. I never saw them again! After that I ran a very heavy cable through every peice of equipment on the trailer, that in itself was a deterent.