GThe defense will have to prove there is reasonable doubt - that Casey did not have possession of that car during the entire time. There's nothing saying that anyone else had possession or access to that car when Caylee went missing. There is allegedly Caylee's decomposition in the car meaning that a dead human was there. If they could only identify the Mitochrondrial DNA from the hair, we know that Cindy and Casey are alive so, by process of elimination, it would have to be Caylees. Remember they have to prove REASONABLE doubt , not FANTASY doubt
