I just watched the local Phoenix Fox 5 o'clock news report, here's some of what was reported. Please note this is not verbatim, just going from my memory:
The Smiths showed up for their lie detector tests at noon at a police substation. It is now five pm and Jack is still inside the building, presumably still talking to LE.
Tammi came out around 3, said she had a bit of information that she turned over to the police today. She said that she thinks this information will help them wrap the case up very soon.
My impression of her, my opinion:
While being interviewed, she was very pleasant and nonchalant. She looked like she was having a friendly casual conversation. Her segment was short, but she did NOT plead with anyone to return the baby, or even act the tiniest bit concerned about the baby, she was smiling and laughing.