I mean for any other cops or tracker, watcher, and whatever other investigative roles to investigate Kadabra tonight, assuming that there are any. The reason I think this is because in the last mafia game there were two cops.

No, Slowpoke, don't investigate Kadabra again if you already investigated him. An insane cop means what whenever the person investigates someone, the results turn out to be the opposite. The person does not know that they're insane. It's hard to tell if you're the insane cop by investigating anyone else, because they could be lying. I think the only way to know for sure if you're an insane cop is to investigate yourself.

Edit: I really hate how this is playing out, though. There's way too many uncertainties right now, but I think I will stick with my vote. If Squirtle is actually a citizen, he still would be randomly voting without backup and that may hurt us in the long run. Then again, Psyduck has been doing some of the same, and I think he's a citizen. I could be wrong about both of them. I really don't know. The second day is almost as bad as the first, honestly. I'm conflicted, but I'm just going to stick with it.