I think with Duckenfield, he told a desperate lie, but then his superiors helped him perpetuate it by building a whole narrative around it where it seemed like it had actually happened, was the correct course of action, and he was thoroughly supported in it to the point they tried to create the evidence that made it reasonable.
As much as I hold Duckenfield morally and (criminally) responsible, I also feel he was a cog in the machine, and was used as it saw fit at the time, but equally they would have no scruple in scapegoating him for the whole thing when many, many others must be culpable also.
I read he said he blocked it out for some time, effectively shutting it out to the point where he could not bear any mention of the word Hillsborough, but over the recent past he has begun to face it with the aid of psychiatrists. I want to believe his remorse now is genuine, but it is so little and too late for many, and only really showed when he was completely cornered and it was not going away.
I am pleased the families have the beginnings of justice, but there is no undoing the past 27 years, and so many have been placed in such a despicable light, it destabilises your world view. I choose to concentrate on the heroism of the fans, the selflessness they showed in the direst circumstances, the Liverpool team, led by Dalglish and his wife, who were there for the families in both the immediate aftermath and the years of legal turmoil since, and most of all the families themselves, who showed such courage and resilience.