Only two things came to mind for me. Can you get your oldest a camera cell phone to take with her, so that she can discreetly get evidence. I know putting your children in these positions is awful, but sometimes it is for protecting them in the long run. Fighting the system always takes proof not just your word. Do you know anyone that could teach the children any self defense? A one day training course that my daughter took in Girl Scouts helped a bunch. Sorry that is all the advice I could come up with right now.

rjwife