In any case, if LE thought there was any real possibility that Haleigh might be at this location (with whomever) and she might be located, then wouldn't it make sense to send PCSO personnel to the location? Specifically because of identification of the child. Who would be appropriate to make an arrest, if the child were found? PCSO personnel? Local LE? Either of these? Would it be necessary to bring in the FBI if she were found, since obviously, she would have crossed state lines.
I don't mean to jump the gun, here, since they are probably just asking questions. But, it does raise questions in my mind about how it would be handled if she were found. I really don't know, but maybe some of the posters more versed in LE protocols would be able to answer.