The sexual assault allegations against Duke lacrosse players were headed for criminal court. They are unresolved because powerful people prevented them and their alleged victim from having a day in court, evidence and arguments being heard from both sides, and a jury rendering a verdict. Instead their parents did everything possible to keep it out of court (why?).
What you describe is that they are unresolved - there was no evidence, verdict. That was all suppressed, including by attacking the prosecutor. Why not clear their names in court?
Prosecutors in every other circumstance wield almost unchecked power - except when the children of the powerful might end up in court. Name another prosecutor treated in this way.
I don't know it was egregious; I think that was the media blitz by powerful people trying to shut them down.
Regardless, it happens all the time everywhere - witholding evidence, fabricated evidence, forced confessions, black site torture, endless harassment, etc. etc. What this DA allegedly did was relatively nothing.