Obviously the accident theory involving her dad is complete bullshit and a lat ditch effort by the defense to paint her as some kind of victim. It's reprehensible. Never once was that brought up during the course of the investigation, but she feels safe enough to mention it to the defense to bring it up during her trial? Bitch please.
I am gobsmacked that her parents, especially her father, haven't voiced their outrage. But Casey is a master manipulator and liar. She's probably cried to them behind the scenes that it's all the fault of her defense, that she's only going along with it because it can mean her freedom, and please just go along with it for her sake, because she's so scared and alone. Her parents are such enablers.
One of her friends said that she got off the phone once after creating a lie and laughed about what a good liar she is. I honestly don't know how she keeps the real from the fiction separated in that head of hers. She's a nasty bitch, that one. Anyone who crosses the only people who have had your back through this whole process is unbelievably cruel.