I realize the sister, Christina, can be viewed as a victim herself, but I find some of her statements very disturbing. She shows a total lack of empathy.
In the father's early statement to police, he pointed a finger at the sister. Normally, I would've been outraged that he was trying to put the blame on his daughter. For some reason, his words rang true, and reading this additional information makes them even more believable. Don't get me wrong. I hold him and the stepmother responsible for Christian's fate. Don't have any warm, fuzzies for his biological mother, either. Christina, though, seems to share her father's sadistic nature. I pray she's not allowed to be alone with younger children.
Rest in Peace, Christian. I am so sorry you were made to suffer so horribly by your own family.