There are basically only two possible positions one can take on the Caylee Anthony case. Either Casey Anthony was totally inept at everything, in which case the police investigators have managed to bungled the case from the very beginning.

Or, you can take a conspiracy position where more than one Anthony family member conspired together in order to deceive the police in some type of brilliantly executed plan where Casey Anthony is viewed as some kind of a diabolical genius that has managed to deceive everyone, most of all the crime investigators.