Daughter's Behavior-RAD?

Hi there, We adopted two kids from Russia 9 years ago. My daughter was almost 4 when she came home with us. My was about 15 months. My daughter has always been a very challenging child. Massive temper tantrums at first, very stubborn, etc. As she got older, she started growing out of them a bit altough the stubborness, extreme possessiveness and problems with peers has always been there. She and I seemed to have a pretty good relationship. There were ups and downs of course but she would talk to me, we would do mother-daughter things. She never showed any inappropriate behavior earlier when it came to strangers. She always did seem bonded to my husband, son and me. She always had a number of school problems with peers and would usually cause dramas, frictions and eventually was moved classes when she was in 5th grade. Up until now though, she seemed to fit in fairly well with the family and I never suspected any attachment issues. Over the past summer, she seemed to grow up a bit and was off to a great start in 6th grade. She signed up and participated in a large number of after school events. She was excelling in piano which she had taken for 6 years and was making tremendous strides. She was involved in the school orchestra, the school play, cross country, etc. She was even making A's and B's. However, after the first part of the year, things started going downhill rapidly. It iis almost like a different person started possessing my daughter's body. Peer problems, abuse of the cell phone, extreme stalking of several boys, in class behavior problems, possible police action because of the stalking, lying, manipulation of teachers to where she was wandering the hallways, etc. Then the rages started---towards me. My life is a torture almost 24 x 7 with her rages. She says the most vile things imaginable--towards me. A few weeks ago, the hitting started when I try to calm her--I have bruises on my arm, a sprained foot and broken tooth today. She also has caused extreme problems at school making allegations towards others that aren't true. She even accused me of sexually molesting my son and then admitted that she made it up to the school counselor to get to me. Around the house, we have to lock everything up since she steals money and any possession that means something to me. I've had to call 911 once to settle her down. She was leaving the house but prior was opening all my drawers, calling back phone numbers on my phone because I was spreading "my lies." I know that she is very angry about her adoption right now. She sincerely believes that I kidnapped her from Russia and took her away from her loving family. We've shown her photos of her and her brother at the orphanage (they aren't biologically related). She doesn't want to hear reason. As the school counselor told me, she seems to suffer from "deluational" thinking. I know hormones are in play now although she started her period almost a year ago and there weren't any issues. We have her seeing a therapist, a psychiatrist and the school is working with us to get her into a specialized child psychiatrist who is very good. She has threatened suicide 3 times now--one sent her to the ER. The last incident were notes found in her locker to me and my son. She expressed deep remorse as to how she was acting and said that she deeply loves me inspite of everything she says. Working through the medical system has been frustrating. Initial diagnosis was depression but the later psychiatrist diagnosed bipolar disorder, ODD and possible RAD. I agree with the bipolar and she is on meds although I haven't seen any change yet. I agree with the ODD---4 independent health care professional have diagnosed this. The RAD I'm not so sure about although the elementary counselor had strong suspicions in addition to a developing personality disorder. We are in the process of looking at some inpatient hospitilization and possible referral out of the school district. We have a wonderful alternative school just minutes from our house. I know that I'm babbling a bit but has anyone dealt with a situation like this where it is like a demon has possessed your child. This isn't a child that just came into our house. She has been with us for almost 9 years now and this has hit us so very hard. Does RAD suddenly appear or were their signs (like problems with her peers) that should have sent up red flags? I've read some of the other RAD threads and they really describe my daughter perfectly. She seems the happiest when there is the greatest drama and strife around her. In fact what is disturbing is that when things are so bad, she has a little smile on her face. She really is enjoying the attention, even if it is negative. I am going to pursue hiring a private investigator to find out some info on her birth family. Her mother was in jail, the father we know nothing about. I would like to know if there is mental illness or any other tidbits we can find out to help us with this puzzle. We are truly at our wits end at this point. Any help or insight would be appreciated. I will start taking a look at the RAD threads, blogs and pick up some books. It is going to be a long road for us I'm afraid.