CARER just killed my cats

There's a carer that comes twice a day for 10 minutes a time to an old couple a few doors down from here. Here is a cul-de-sac, 10 terraced bungalows on one side, rear of houses other side, very narrow, with kids, dogs and cats about. And the birch ran over and killed my beautiful cats AND laughed. I wish I could kill HER