I'm with Bruce on this, except I don't think I'd shoot the dogs under any circumstances, unless they were a clear, immediate threat to me or my own animals. The main point is to be sure that YOU are legally correct in anything you do. That way you are keeping the pressure on him and not transferring it unto yourself. (e.i. You threaten him or do anything that will get the authorities looking at you instead of him.) Of course, you might be able to bring some sort of civil suit against him, although that, most likely, would require the expense of hiring a lawyer. It's too bad these things happen. Good luck.