is never a mistake. I think we only need be concerned with what "The Truth" really is. Was a crime actually committed here at all? That's unclear. We don't know anything at all about the emotional state of this little girl, or if she was alone wandering the streets of Davenport, or visiting with friends, or what. Did a predator take advantage of her, or did she imagine something happened which didn't? These things are unknowable.
I think an interesting question is why Phil Evans (and possibly Sudhalter initially??) decided against revealing this incident. It's true that in the 70s this kind of revelation might have shocked people into silence on the whole issue, but now we're more used to talking about it. I wonder if Evans brought up the topic with anyone who actually knew Bix. In any case, whatever Evans knew about the incident, it didn't seem to put him off Bix.
If Bix's music cannot stand on its own merits, then so be it.