Huskies accused of Killing Pets?

We have two huskies and of late the dog has escaped a couple of times. We came home to quite abusive neighbour the other days saying that he had killed another neighbours rabbit and cat. The local Ranger called over and said they had reports of our dog being dangerous. I don't condone killing animals by other animals but I resent the word dangerous; Consequently the ranger went away. To our knowledge he has not been out again until today, and within 5 mins another neighbour knocked on the door to complain. I asked her how she knew it was him and she said she just does. We have no proof that he killed, although on walks they both show attraction to cats. There seems to be a couple of vigilantes formed in the area and are clearly pointing the bone. We have secured the entire fence and today they found another way out so we have secured that area as we. The Dogs are walked extensively every day. What on earth can we do. If they get out again and do kill I fear they will be put to sleep. My husband and I are beside ourselves. Just the thought brings me to tears. Anyone with any ideas as to what to do.