This sure is a weird case. I think it's totally wrong that supposedly the police can't do anything about her being missing until the Marines say she's AWOL. In this day and age, that's got to change.
Anyway, here's some tidbits from NG's show last night.
http://transcripts.cnn.com/TRANSCRIPTS/0801/09/ng.01.html
GRACE: She`s not going to be deployed. What are you talking about, deployed?
KAY: No, not -- what I`m saying is that when the sheriff`s department began their investigation on the 19th...
GRACE: OK.
KAY: ... they interviewed the people that knew her. They interviewed people at the base. They conducted an investigation to figure out where she was at. I believe they think at the time that she was where she wanted to be.
GRACE: Oh, voluntarily missing.
KAY: Right. Right.
GRACE: Because that is -- that`s a gap in the timeline that`s very disturbing to me.
KAY: Right.
and
GRACE: That`s my next question. Who`s the baby`s daddy? Mandi Sheridan, do we know?
SHERIDAN: I asked her mother that exact question, Nancy, and she told me that her daughter was a loner, somewhat of a loner, and that the family was not aware of any boyfriends. And then she said she could not comment beyond that.
GRACE: OK. She`s a loner, and the family didn`t know who the boyfriend was? Is that what I`m hearing?
SHERIDAN: She just told me the family was not aware of any boyfriends. And then she said she was not able to comment any further.
GRACE: OK. Lindell Kay.
KAY: OK.
GRACE: The father hasn`t come forward? The father`s not out there beating the bushes, trying to find his unborn child? I smell a rat.
KAY: Well, that`s -- yes, that`s more than likely maybe the case. But I think the important thing to point out is the car was found Monday, but it was not at the bus station all this time. They checked the bus station over the weekend, it was not there. So either Maria or someone else put her car at the bus station on Monday.
GRACE: I assume the car has been impounded and it`s being processed for prints, right, Lindell?
KAY: The FBI was -- spent two or three hours going over it today.
(MUCH more at the link)