I am a child and adolescent psychiatrist by trade. I see cases very similar to this far more often than folks really want to think about. Why, just a couple of weeks ago I had a girl from another country who was adopted by a family in another state. Her biological mom was a prostitute who killed one of her johns, then left this girl and her older sister in the one-bedroom apartment with the rotting corpse for several weeks. They ate their own fingernails, then finally broke out of the apartment to get food and were found. (Oh, and at some point my patient had been stabbed in the face by her mom, too.) So the first US family adopted both girls and brought them over. They ended up pimping them out, though, and finally DCS got wind of it. They were taken into foster care and re-adopted, but, as you might imagine, they have a little trouble bonding and such. (Yeah! To say the least!) They were overwhelmed and lost in family dynamics, just couldn't handle it. Now are both in group homes and doing okay. And that's just one of my more recent stories.