My "best friend" is turning everyone against my daughter

Check my previous posts for how I've arrived at this situation. Here's a brief recap:Found out my best friend from childhood's son (21M) was preying on and grooming my daughter (14F)Began a police investigation that unearthed even more details about their relationship (did not discuss this in previous posts because I was too disturbed to process it at the time, but he would often discuss sex and sex acts with her, ask her to send naked pictures/videos of her masturbating, etc.)My best friend accused me of destroying her family because I called the cops on himI wish she would continue to take this out on me and blame me for everything that has happened. Instead she has began going on a full rampage against my 14 year old daughter, telling all our mutual friends in our town that my daughter is a slut and purposefully tried to ruin her son's life. She has been making up nasty rumors about how my daughter apparently would "throw herself" at her son despite him trying to ignore her and made up some other stuff about how my daughter lied about everything and how she has sex with multiple men (my daughter is a virgin and not sexually active). I'm honestly too heart broken for my daughter right now to write it all out. My daughter has a very active social circle but many of her friends have obviously heard these rumors from their parents and have stopped talking to her or also engage in the bullying and name calling. I'm attaching an image of one of the texts her friends sent her just now... https://ift.tt/2mB5hzS I think my "best friend" and her family are doing all of this to "help" themselves in their police investigation but I don't really care for the reasons. It's so awful and I don't know what to do...I've gotten her a therapist but I wish it didn't come to this. It's hard not to blame myself. Some advice/support would be nice because this has been a hell of a week and the only reason I'm still holding it all together is because I know it must be even worse for my baby girl. via /r/Parenting https://ift.tt/2uLab1R