Gawd...this is the most frustrating, heartbreaking situation!!! Just do WHATEVER you have to do to make sure you are able to relocate in your divorce settlement. Use all this evidence to throw yourself on the mercy of the judge and beg, if you have to, to be allowed to move your precious girls however far you need to.
Can you get a written statement from your neighbors about what they witnessed on Sunday? YOu don't think they are willing?
Karma most certainly is a b*tch and I have no doubt that he will pay a miserable price. If I didn't hate him so much I'd feel sorry for him.