Does what matter? A detective's testimony? They wouldn't even need the tapes. But, as JoPoy points out, they can record without consent in this instance.
You think the cops, as a routine, would begin their investigation by sabotaging it?
Even without the recordings, the cops will attest to what they heard on the call.
Her attorney clearly didn't;t share your concerns, knowing what they know and what she has said. She isn't going rogue, safe to say.
What she has done is put this out there to the jury pool---it's a sharp move on the part of her and her father.
She's been waiting a long time for the criminal case to move forward. It's a tactic to put the case out there since everyone else have been dragging their feet, most obviously the school.