I mean, this still harms us politically with the Gov and by extension the Library. He has resources sure but nothing that we actually need. We've worked with evil people before but that was always during extenuating circumstances and there already is a unit in Chicago that deals with the supernatural so we have a pre-existing avenue to pursue.
In Marcone's interlude he compared Molly to Superman. Like he used that term specifically. Is Marcone really going to elevate himself to Supervillain status when he knows he lives in Metropolis? And we've been described as the "Slayer Queen" during the Alpha's interlude so we have a much bloodier reputation than Superman.
If we apply steady pressure and he sees the writing kn the wall? Absolutely, he'll become a supervising of sorts. He may try to get a coin, engage In soil trade with Yama Kings, go for some other path to empowerment. He did that in canon, and his resources and knowledge open up avenues of doing this that most people don't have.
I agree that we have no reason to help Marcone, hut I worry that, if left alone, Marcone will find ways to become a problem for us. Because Odin is clearly invested in him for some reason.
I am tempted to ask two things via the crown:
What is Marcone's Fate as known to Odin
What is Marcone's motivation
The argument about the government is both a strong one, and not. Being a criminal under mortal law is so commonplace in supernatural world so as to be inconsequential. All Jade Dog ghouls are criminals. Molly is, without a doubt, a criminal (well, no, because sovereign immunity, but if not, she would be). Harry, as a Warden commander, is a leader of a vigilante murder cult. Marcone is different because he is a mundane criminal first, and supernatural actor second. His crimes are not consequence of masquerade making it impossible for the law to handle his actions properly. They are just crimes. How big of a difference that'll be, politically, is a question. In Las Vegas Library / Feds had no issues with subverting criminal elements, but St. Giles society being almost a terrorist organization is a problem.
I think if Marcone was subverted and the criminal side of his organization swiftly and efficiently dismantled, while he maintained his functions as supernatural law enforcement, we wouldn't face much backlash. Well, maybe from Odin who I think won't appreciate us taking his champion (or whatever it is Marcone is to him at this point).
Suffice to say, I am conflicted about this vote, and it is making me think a lot.