During the discussion about the Miranda Rights Geraldo and Dershowitz say that it was OBVIOUs that she was the only suspect while being interrogated at Universal.
But I disagree. They also, even AFTER they grilled her hard, asked her if Zanny was able to have children, if she had expressed wanting to keep Caylee herself, and they also asked who the birthfather was, and wanted to know if his parents had wanted the child. So I think there is evidence that they were open to many possible scenarios still.
Besides, HHJP, a very well respected, well educated and highly experienced trial Judge
had a hearing on this exact issue. He was very thorough in his questions and in his verdict and written decision. So I think we are safe. imoo