According to msm MW had left the house by the time deputies showed up. The grandmother told them she didn't think Ellorah was in any danger so the deputies left. It's not clear if she was aware that when MW left he had Ellorah with him - neighbors reported seeing him leaving the house with a "bundle" but we don't yet have a timeline other than she called 911 around 5:30.
The odd thing to me is that she heard the weak cry, the phone line was cut, the breast milk was unused BUT she did not think the baby was in danger. Then, conversations happen for hours after the baby is missing? I agree with many who think something is not quite right here.