You don't.
But, not only is she claiming the sexual assault, she's claiming there is an audio recording of a phone call where Araiza admits to having sex with her. That would be pretty hard to fabricate, especially when phone records exists regarding incoming and outgoing phone calls to include subscriber information. Not to mention it was supposedly done under police direction, i.e; controlled phone call.
I believe in letting things play out but I also believe Araiza is toast in this instance.