They wanted to ask her questions. Lawyer could be present. She didn't want to. FBI now has a subpoena. I have no idea where you're getting this "indefinite imprisonment" stuff from. They didn't have a warrant for her arrest.
It's also clear you didn't read the article entirely before making a comment that now acts to distract and misinform.
Did you not read the article?
>Lovecruft told CNNMoney she had been willing to meet the FBI with her attorney present. But Rosenfeld was told by agents that they would circumvent him and approach Lovecruft directly.