My 15 yr old daughter was physically detained by a male flight attendant. airline wont give me his name. Do I have a lawsuit?

My 15 yr old daughter was physically detained by a male flight attendant as she was getting off the plane. He pulled her into the front galley and held her against the cabin wall calling her degrading names. Supposedly he was looking for an unacompanied minor but never asked my daughter's name or what he was doing. I filed a compaint with the airlines but they won’t give me his name to file charges. The airlines said that he was within his rights - Note-my daughter was not traveling as an unacompanied minor, if she was wouldn't they have known when she boarded the plane? Also, I do not believe that any adult, except for police, has a right to physically touch anyone, especially a young girl. What can I do?