Let's use a little inductive reasoning here...
On the other hand, if they fear the killer, would a selfish person lie to police, sit in jail and take the blame for the murder? Possibly. If they genuinely fear for their own lives, they have something to gain by taking the blame.
This scenario may fit with CAs actions.
So, out of all of these scenarios, the only two that make any sense both indicate that Caylee is no longer alive.
I invite anyone to examine my logic and try to find the holes in it.
However, if you agree with this logic but still maintain that Caylee is alive, then you must also believe that CA is not nearly as selfish as her history indicates, since that is the only non-factual piece that this logic is based upon and the wool is definitely over your eyes, IMO.