I know I'm fully in the minority here, and that's OK, but I think Casey will be the one to cave. I suppose when we're talking about "cracking" what we're really talking about is "breaking." They all are cracking, for various reasons, in various ways, and will most likely for years to come. Cracking is where the rampant emotions are seen in a limited and uncontrolled state but are forcefully throttled back and the exposing cracks and chasms filled in with any multitude of defense mechanisms, sealed once again against analysis and public disection. A "breaking" is where the wall, the shell, the facade, are not just shattered beyond repair, but beyond any care of repair. The internal pressures required to do this are, fortunately, beyond most people's understanding as it goes far beyond the emotional. The inner workings of the mind of a narcissistic sociopath is obviously not what anyone would call "normal," - neither is what breaks them. Casey is safe within herself as long as SHE sees herself, and her secrets, as hidden and controlled. She's done this, because she's been allowed to, all her life. Casey is not a super-human, more intelligent, or an emotional fortress without a conscience, - she's simply doing as she's always done, envisioned a reality and image of, and for, herself and ignored everything and everyone else that went against it. If she becomes aware that all of her dark and hidden corners are being being fully lit up and exposed to everyone, where she knows that everyone "sees" her, I expect her to shatter like cheap glass on a hard floor. I suspect, for this reason, for the prosecution to rip her apart from day one of the trial, but little to nothing before. I don't think Casey's ego, erected self-image, or soul, will hold out till the end.