My dog killed my neighbors dog.. I need some advice?

as much as i dislike dogs like you feel you must own, your dog did nothing wrong ... your dog was contained in your backyard ... your dog could not get out of your secure backyard ... you are not responsible for one dime ... you should tell them you are sorry it happened but their dog was in your yard and you owe nothing ... if they persist, tell them to take you to court because they will never win ...