I think its easy to underestimate just how good some of these guys(top flight lawyers) really are. They can be on the left today and on the right tomorrow. Many believe in nothing at all only the process. It's hard to get into their minds. So really other than actions I don't know what there is to go on.
The best hide in plain sight as well.
We can see what he is doing because he doesn't hide it.
Some folks have a gift of discernment for evil.
I have it.
I am certainly not error free...but Dersh does not seem to be evil so far.