Thing is, there's no such thing as "where guilt is not in doubt". We have a legal standard of "beyond all reasonable doubt", and still we know for certain that

Thing is, there's no such thing as "where guilt is not in doubt". We have a legal standard of "beyond all reasonable doubt", and still we know for certain that this standard, when applied to its full extent as it gets for death row convicts with all the multiple appeals courts, it still manages to convict a nontrivial number of innocent people. So the judgment on whatever should happen in case where guilt is really not in doubt must be reserved for omniscient infallible divine beings, as we the people simply are not capable of implementing a process that's able to determine when guilt is not in doubt, as all practical experience shows that we've tried and failed and failed and failed to do so.