Hmm lets analyse the facts and speculate a little...
It took place in Houston, Texas, conservative white capital. Divorce, White male, professional, lots of legal firepower behind him in a divorce case. No matter what he did he will get at least partial custody due to bias on the side of the jury. I have seen that stuff happen too many times to think otherwise. Taking a gun out and shooting dad is not something a 10 year old does, not matter how much he gets talked into it by mom. My speculation is flat out, the father sexually abused the kid and probably that was one of the reasons for the divorce, however his legal firepower was big enough to prevent him from not getting custody. Kid gets molested repeatedly, figures out where the gun is and blasts the bastard finally. I'm willing to bet a considerable sum that that is about what happened her. Will he get off, maybe, depends on whether she is able to get a good lawyer and a psychiatrist that digs out the truth and that there is not too many biased, conservative white dicks on the jury.
My 2 cents,
Regards,
Ahmed