I read it was unrelated to policing football. There was a junior PC who kept on radioing in his concerns while out and about doing his day job (unrelated to Hillsborough or football policing, just doing his normal day to day job). A load of his colleagues decided it would be a good wheeze to dress up in balaclavas pretending to capture said PC in a faked armed robbery. The experienced officer (Chief Superintendent Brian Mole), who got moved to Barnsley, was the boss of all these people - the junior PC and the other idiots - but did not take strong (enough for his boss) action against them. His superior, Chief Constable Peter Wright, took exception to this light handed approach, and took matters into his own hands, eventually culminating in some of those police officers who faked the armed robbery being fired and other serious repercussions. It was at that point that Wright, allegedly, took a disliking to Mole and got him shipped off to Barnsley as a punishment, whilst bringing in the inexperienced Duckenfield. The story is here in more detail, with more damning commentary about Peter Wright's involvement in both causing the disaster through poor leadership and then covering it all up afterwards:
http://www.theguardian.com/football...-deadly-mistakes-and-lies-that-lasted-decades