How would LE know anything about lifestyle?
If they asked who else was in the house, there is no reason people cannot have others living with them.
I would not expect a call to help find a missing child to need my entire life history at that point. The kid could have fallen down and was unconscious somewhere for all the parents knew at the time.
Also, they must have exhausted the people they knew she went to because a simple phone call would provide a yes or no answer,
The knocks on the door, to me signify people they do not well enough to have their phone number. You know. At first you let your fingers to the walking. Among them, they must have had at least three cell phones, you would think