My 18 year old special education son's former elementary teacher came to my job and began arguing about letters of complaint that I had written about her years ago. She has held a grudge and retaliated by writing an untruthful letter to my employer about how she was treated at my place of business. She visciously disclosed his medical history and private information on his mental disabilty. Could you please tell me what legal recourse I have because I know that that information can never be legally disclosed without my or his permission. Thank you so much.