He sounds like he is no different than thousands of other elders who abuse their power and are guilty of hypocrisy in their personal lives. I'm sorry but this is not a shock revelation and you were bang out of order to imply he was using child abuse images in your OP.
Apart from careless talk about judicial matters is he particularly harsh or abussive with the r&f? If not, I say ignore the whole thing. How much do you care that the borg has hypocritical elders? We all know that already, I couold tell you about plenty I knew when I was an elder. If you get him deleted what next, there are plenty more to fill his shoes.
If he is the sort who bullies others then I would talk to him privately and tell him he has 3 months to find personal reasons to resign from being an elder otherwise the shit hits the fan.