Sorry to point this out, but the fact that he did nothing to prevent the law abuse while he was an employee there speaks volumes about his moral compass.
That's rather presumptuous, do you happen to know more than what's in the post?
What? It says nothing about his moral compass, because none of us know the details of what went on. Unless you would like to fill us in?
It works to give the benefit of the doubt and make a helpful contribution. For instance: my helpful contribution to you is did you notice the person said they had evidence? Maybe they'd been safeguarding some evidence, perhaps at some risk, to ensure justice. Maybe even more. We don't know they "did nothing" so assuming that may be incorrect. :)