There is far more than "he said/she said" to this .  Unlike in some contested sexual assault cases, there is no question of consent  or the victim's recall being impaired in any way by alcohol etc.   Swift has witnesses to the 
 frightening, brazen public humiliation she endured,  and a photo, too.   But, this is not just about Taylor Swift.  David Mueller  needs to be  criminally prosecuted, and, if found guilty, sent to  prison.  That is the only way to protect women everywhere.