I have always said they will go after George. He admitted to seeing her last (which I never believed) KC will say she left after the fight and left Caylee there. She will say George has always had a violent temper (which he has exhibited many times on TV) and that she was terrified of him. She will claim he put the body in her car (he had a key) and when she found it she freaked out so bad she had a psychotic break (flat emotions, etc.) She will say he threatened to kill Cindy, Lee and her if she told (he bought a gun and hid it) and he planned on killing them all if she talked. She will say she was protecting her mother and brother. She will say he gave her the "script" and made sure she did not vary from it and told her he would get her out of it if she would keep her mouth shut.
She will say the gas can incident was when she first saw the body and she didn't know what to do so she ran. Remember she said "he" ran over the squirrels which made the car smell. That is why he "chased" her as he told. She has been afraid to speak because she knew he would kill the others, so she waited until trial to tell the story.