I was just going to say something like this
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
While I am not a trained expert, I do have 6 kids, aged 10-28, the youngest is the only boy. I am going through some stuff with my own daughter right now who is 13 going on 25. She speaks, looks, and carries herself as much older, and it's frustrating, to say the least. Her current favorite game is "I don't want to live with you anymore. I want to live with my Dad". HE EATS THIS UP! You can't convince him that she is full of drama & embellishing/omitting actual events. Problem is, Dad travels constantly. There is zero stability for a teenage girl in his line of work. This comes up ANY time she doesn't get her way. He is an enabler of her behavior and it's hard to deal with in house, every single day. SO in this sense, I feel for Mom. My gut tells me she isn't responsible for the crime. Did they fight? Probably. Was there a competition for dominance in their relationship or attention? Most likely.
MOO is that this was done by her peers. Girls. Multiple. Possibly gang-style. I don't think murder was the plan. I believe it was a butt kicking that went too far. And of course, I could just be way off base here..