I once had a friend give me a more direct number in case the violence in my home reached a level. It was my 13 year old but when he was 11 is when my friend gave me a number. What's changed is the intervention classes at his school care of a school district that has been undergoing a major overhaul addressing the behavioral statistics.
I have read books and articles and have adapted some tools. When I was with my previous insurance and with my long term T, his suggestion was asking my son what he likes about himself.

When I was about 13/14-15, I was doing what your daughter is doing. Which stopped soon after my attempt. I moved in with my mom within 6 months of that, too. Right to the same district my children happen to be in. I wasn't quite angry like my son has been, but I certainly had pain of an emotional kind.

I was experiencing that new term CEN which is childhood emotional neglect.

If her needs, that she doesn't even know she has yet, are unmet--and it might not be from you at all, then this could be the soothing she's discovered. Keep ontop of it with her T and Dr and try as hard as it is, to see her as her own person separate from that genetic fear/guilt that you have.

They have a saying around here, it's not the children with the parents that continue to show up and try, it's the ones with the uninvolved parents that you've got to worry about and I'm personally extending that to literature out there that discusses maternal depression in a clinical sense where children and behavior is concerned.