No evidence of sexual activity of any kind, maybe she dreamed she was raped in her induced state of drunkness
One possible way I can see this playing out is that at some point (after the May election), the DA announces that she is a "victim of drug dependency" and that her account of what happened was so clouded by her "unfortunate condition" that her testimony is unreliable and the charges will be dismissed by agreement.
The woman is then not charged for making a false accusation, but admitted into a drug treatment program. She fends off possible lawsuits by claiming that her accusation was not made in bad faith, but was a product of her drug dependency.