The celluar morphology of the remaining tissue of the victim would scream out under the microscope if the body had been frozen. Now before anybody yells at me that "no tissue remained", yes, no SOFT tissue remained but the hard tissue of the skeleton did remain and the bone marrow contained within would provide ample evidence of erythrocyte lysis due to dramatic temperature change, something that definitely would have been noted in the post report. Why? Because it provides the detectives a venue to search for more evidence! Most probably there would have been fine line fractures, of course identified as post mortem, as the long bones shifted from the dramatic temperature changes (freezer to FL summer heat) and would have been noted in the post report.
On a more gruesome note, managing a 35+ limp body is not an easy task (unless bound, appendages will flop & flail in random manners) and containing it to shift into a chest type freezer requires some strength and balance....graphically put, I can see that she would probably cause some post mortem trauma, possibly deep enough to impact bone and none was noted on the post report. This felon doesn't appear to be a clear thinking, goal directed planner, nope, too much effort to lift and freeze Caylee's body.