unknown. so the question arises if the skull wasn't opened, whatever mistakes were made in this? >> every murder, autopsy the head is opened up, unlike what the prosecution said and should have known was invalid science or junk science. and yet the judge let it in. >> to prove caylee's broken body was stored in the trunk of her mother's car, prosecutors called an expert in the smell of death. >> the odor was extremely overwhelming. i was shocked that that little bitty body could have that much odor. >> did you recognize the odor coming from the piece of carbon in the can. >> yes. >> what do you recognize that odor to be? >> i recognized it as human decomposition. >> he smelled -- >> unusual. >> unusual? >> and dr. voss, you claim he's