I saw ur posts on other forum,

since this neighbour is a bad one, you have to sue him or he sues you, either way, you need a lawyer. Why not consult a lawyer at once. It seems you can't avoid this.
By the way, can you call the police? since he put something on ur property and refuse to remove them.
Like, if I put a garbage can on your lawn and refuse to remove it, you will call the police, right?

Let's us informed on your case.