No it isn't. They haven't even remotely suggested that he's guilty of a crime and got away with it.
BBC News have reported that while the BBC knew about the police investigation a decade ago, the current leadership were only made aware that the alleged victim was under 16 last week, and that's what led their decision to sack Mills.
The complaint's age is massively relevant. It's one thing to say you've been accused of sexual offences by some guy you had a drunken one-night stand with and ghosted. It's quite feasible how that could happen to a young DJ. Explaining how you've gotten into a situation where you're accused of serious sexual offences against a child is a different matter.
CPS said there was no case to answer
They did not say this. They didn't feel that the evidence available was more likely than not to secure a successful prosecution. The police who investigated and submitted that case, and multiple levels of senior officers who cleared it, quite clearly believed there was a case to answer.
Mills would never have been given the career opportunities he's enjoyed at the BBC if they'd known there was the potential for that story to break.
He didn't disclose the extremely important fact that the person he was accused of committing serious sexual offences against was thirteen. Whether he lied about it or simply neglected to mention it, that's a massive breach of trust. Something with the potential to cause the organization reputational harm, as it has done. Something that will lead to questions about what they knew, and whether they hid it from the public while paying him millions of pounds of our money over the years.
They were completely justified in sacking him.