take a video of him with a camera that shows that he did it, show that it is his address and on his street, say to the camera his name, and the state you are in, and country, and show what he does on camera, then after that walk away and say that he does this for a living then show it to the police(one question though, is this person even real?) but before you take the video tell other people on your street to argue with him all at once and teach them a vocal signal that is a wail, then a loud OW! and that when they hear that they have to get bored slowly and stomp/walk back home depending on what they did, while they argue show his address and his street, say to the camera his name, and the state you are in, and country, then yell them the signal, after that start the film like planned and bam! foolproof plan!
read this 3 times so that you understand.