Fox is asking a silly question to stimulate viewers, it is dishonest in this case. The answer to the statement is that the Texas authorities received their first call before this woman made her call, to the other lady, it was not made to the Texas people, that is why they said she was a person of interest. The woman was on probation because she had made crank calls before and now she is under arrest for violation of her sentence.
Also reported by CNN this AM was the fact that the Texas LEO's had found proof that there were three girls with the correct name in the cult compound.