I have read this thread several times over the past four days but haven't weighed in on this simply because it is way outside my area of expertise and to me there is nothing humorous about what is happening to you Helpless (most of the time humor, or at attempt at such, is what I interject into a thread).
I am heartsick to hear what is happening to you. Whether or not you have any criminal or civil legal remedies are beyond the scope of my knowledge but to me there is no doubt that morally this neighbor of yours is severely lacking.