KC somehow had been emotionally and financially blackmailing her mother for 3 years. She had been acting out with arrogance, attitude and resentment and getting away with it. She was in the driver's seat and her ability to carry it off has got to have something to do with the 'don't worry, I haven't said anything' statement in the first jail visit. She was holding something powerful over her parents. OK, that and the fact that she was Caylee's biological mother but I think it was something more.
When Caylee died the tables turned. To me it looks like a rage killing because of the duct tape in the hair. If it had been an accident and Caylee was wrapped in bags with the duct tape on the outside to keep it together the hair wouldnt have been involved and the tape wouldn't have been ripped into separate pieces. Ill leave that up to LDB (I love her), JA and Mr. George. When she came out of her rage she panicked and said sheet, sheet, sheet. Now what. Oh, I know, Ill drive around in circles until I can distract myself with my own neediness and hunker down with TonE. Ill figure out what to do with the squirrel in the trunk after I get my head together.
She no longer had the power. She knew she'd be caught in the end but hid out with a gusto only her selfish, entitled, narcissistic personality could pull off. Because of her pathological lying and not being caught right away she gained confidence and had time to weave and embellished the story of Zanny. She was now premeditating the set up of Zanny and the kidnapping with friends by mentioning her name to them. It became a power game. In the end she lost. Amy said that on July 15 when KC was confronted she acted like a 16 year old who was caught by her mother doing something really wrong. Amy was surprised at this dynamic probably because she had never seen KC so out of character. KC had to face the formidable force that shed been able to control so effectively but now she had nothing.
Her Zanny story was strongly established in her mind and when challenged by her family she came to the end of the hall and offered up Zanny and the kidnapping. They were buying it so that boosted her confidence in her ability to baffle with bull stuff. When she couldnt control that story anymore she went silent to everyone but the DT
I think the defense argument has something to do with the origins of that 'don't worry' statement. What was KC holding in order to blackmail so effectively? JB says that he may not have been able to get the forensics thrown out but he is confident because the defense has KC. What kind of story has she woven for them and do her parents know it's going to involve their secret? I can only expect they do.
OK, so this is just my opinion of course and I'm not even sure it addresses the question of defense strategy but what the heck, it's 2:00 a.m. and my submit post finger is impaired. I just wish that the truth comes out sooner than later and that Caylee is honored with dignity during the trial. She will always be a special part of the lives and memories of many, many dedicated people.