Man, I see an all out war with your neighbor over this. Is it worth it? Stray dogs sometimes get in your yard(especially if a female is in heat) they will do anything to get to her. It was an accident but I have a feeling you are going to turn this into a full out war.
You already blamed yourself for not keeping an eye on her the whole time(heck, even children have been injured in such short amounts of time in a fenced yard) that's why it's called an accident. Please reconsider some of the things you're thinking because you're upset. Right now, focus on your female and see what you can do about the pregnancy.
The risk that it contracted brucellosis is very rare, I'm not sure why you would even think that. Please reconsider doing some of the things that might cause more problems. Or at least talk to them before jumping into a situation that you might really regret. Good luck
