What a tragedy. Very, very sad.
The headline is fine though. Prior to this, he was perceived as a hero. Nobody, NOBODY, still perceives him as such. Why? Because he has disgraced himself and the university with his heinous actions. Perhaps "disgraced hero" would have been nore appropriate, but this argument over the headline is purely semantics driven.
Had it said something like "former d-coordinator rapes kids" it would have been underselling his prior prestige. He wasn't just some anonymous assistant coach. This guy was linebacker U.. He was a coaching legend who had a very good reputation within his community. Point is, the headline is contrasting his prior perception with his current. Not incredibly difficult to understand.