I've acquired some insights into the inner workings of law enforcement over the years (not as a defendant!) so, if I may and with all due respect, there's more to the term "dismissal" than just an opinion that a case cannot be proven in court. Trust me, prosecutors are absolutely loath to dismiss a charge once brought, especially in cases that have gained a degree of notoriety or public interest. And to dismiss all charges in multiple-charge cases is very much a rarity. Invariably, prosecutors will reduce the charges before they dismiss them. If they had any shred of a case, especially one involving the emotions that go with alleged sexual offenses, most prosecutors would opt to play it out in front of a jury anyway and let the chips fall where they may. In prosecutor-speak, "dismissed" means "we have no case."
(BTW, I'm not an apologist for the institution located on lower Comm. Ave.)