Ms Haddaway made a secret deal with the prosecutors and the prosecutors did not reveal this. But did she lie? What this article forgets to mention is that Ms Haddaway wore a wire and got Jonathan Smith on tape that he committed the murder in order to get $60000 [1]. Here's part of the dialog for reader's convenience: "[BH:]Why were you in that field with blood all over ya? And they take, I seen ya goin’up the road th…
I suspect at least half the people exonerated by the Innocence Project are in fact guilty. However, I think that sloppy police work should never be rewarded with a guilty verdict, even if it's likely the defendant is guilty.
Usually this means that there's good evidence that the person is actually innocent and the trial was completely botched. There are plenty of rural areas where the court decides that someone "seems" guilty and then suppresses any evidence that doesn't support that.