There is, of course, the whole bell curve of erroneous outcomes. But you can't know a priori who are the genuinely innocent people. The reason justice reform is so hard is because it's hard to get police and prosecutors to assiduously assure people's due process rights when the overwhelming percentage of people they deal with are bad people.

I think prosecutorial misconduct is absolutely unacceptable. But I can also see why it happens, without assuming that it could only happen if large numbers of prosecutors were evil people who would convict someone they knew was innocent just to inflate their quota.