What TallyHo asked.
Only my understanding of your "happy face/PTSD" theory is that the psychiatric experts would testify that because of KC's awful homelife (George's rages & Cindy's competative control issues),KC lies and doesn't show appropriate emotions. Therefore KC acts and looks guilty. But, she's really innocent and Caylee was kidnapped/choked/drowned/had a heart attack.
They wouldn't be saying she was in a dissassociative fugue or that she thinks she is really a lawyer or that she acted happy for 31 days because she forgot Caylee was dead. Like Mary Winkler, KC's behavior's would be explained by abuse. But, unlike Mary Winkler, KC would say she didn't do it. She just didn't and isn't acting right because of her problem--caused by her upbringing.
Right?