These agents that committed this fraudulent forensic activities and the prosecutors that had a hand in this should face life in prison and whatever finances they have, including future pensions and current 401ks, need to be pooled to help the family members of those who were wrongly imprisoned or put to death. That said, each case should be looked at on an individual basis because in many of these instances, the accused was most likely guilty but they needed extra or rigged evidence to lock their case down. It was probably rationalized in this manner and while I want the guilty to get what they had coming to them, I'm not for fudging things. They should've just let the case go cold until they can figure out what they needed to close the case. That said, the police and the prosecutors that push them around, are really making themselves look terrible.
Evidence in a case either exists, or it doesn't.
Those are the two possibilities.
Using a phrase like "lock their case down", in the context in which you used it, is the core of your comment.