To rephrase: You could define whether it is being used corruptly by measuring whether it reduces crime. This is a loaded research question, of course, because

To rephrase: You could define whether it is being used corruptly by measuring whether it reduces crime. This is a loaded research question, of course, because it's studying something that we find abhorrent: Prosecuting people for crimes they haven't actually committed. Scientifically it's super interesting. Socially and ethically it's a minefield.