Your talking about the need to throw someone under the bus to explain that all those connections are not ICA.
Since ICA texted to CA some of her 'stories' of why she can't come home or the family can't see Caylee, that will pretty much be used to prove that ICA admiting that the family didn't have Caylee, SHE had Caylee. And she had her car. Her friends she was hanging with are witnesses that she had her car during that time. Up until it ran out of gas and was towed.
If terpenes found under the car is considered a 'definite' piece of evidence, then the evidence of the body being in the car after death, would be even more so. As shown, she, not anyone else in her family, had the car.
As been stated, The witness talking about the many times she backed into the house/garage during the 31 days. Giving time for her to clean and or take items from the home, to toss with the body. Proof she tossed it? Nope. But who ever tossed, had to have access to the home to get it. And that would be GA, CA, LA, and ICA. Only ICA claims to have Caylee during that time.