First, the "no charges were filed" argument is factually incorrect--charges were indeed filed but later dropped. Second, a DA isn't likely to move forward in such a circumstance without the victim's cooperation. Had she been a cooperating witness, there's a high probability it would have gone to trial or been plea-bargained.
For the purpose of a high-level, public job such as Indiana, for example, the facts of the case and public perception are more consequential than whether CB was brought to trial. A middling D1 program like Ole Miss was willing to deal with all that to grab a coach it couldn't otherwise attract; he was available to them for a reason. If a higher profile school were willing to take the risk, he would never had ended up in Oxford. Moreover, whether the incident occurred when he was coaching or not is immaterial; it goes to character.
Let's assume, for a moment, that Beard is a viable option and Dolson & Co. are currently vetting him. I'm sure they're considering the aforementioned details and much more; they have access to loads more information than we do. And I'm sure they're also factoring in that this occurred two years ago and (presumably) nothing of that nature has repeated itself.
Since, again, Dolson and crew have more information than we do, I'm sure they're looking into everything. If they decide Beard--the person and coach--is the best hire, then let's rock n' roll.
But, imo, logic dictates it won't be CB. For one, the Sampson debacle, while circumstantially different, is nonetheless similar; IU hired a person with known "baggage" and it Titan submersible'd the program. Furthermore, there are other good candidates without such a history ... and Beard, will undeniably a good coach, isn't Bob Knight 2.0. So, then, why would IU open up itself to scrutiny when there are other good coaching options out there?
I'm looking at this from Dolson's and IU's perspective, not that of a fan desperate for wins above everything else. Perception matters. Optics matter. I'm sure they're weighing the risk/reward of hiring CB. And, if there have been no other similar instances, they likely don't forsee it happening again. If it did, however, it would be an awful look, especially with the Sampson hire still in IU's (somewhat) recent history and collective consciousness. Furthermore, if it happed again, those involved in the hire would suffer major professional consequences.
If you'd like to offer a counteratgument, I'll be more than happy to listen and keep an open mind.