Are you telling me she can be arrested with out charges being filed? Now, that is scary.
It’s literally how it works. They don’t file charges until AFTER you are arrested. It may be right away, or they may wait a day or so to be “sure” they have a case. That’s why you see, on TV shows, cops saying things to each other like, “we need to press charges or we’re gonna have to release him.” They can hold you without charges, but only for a short time - unless you’re in guantanamo, of course. ;)