It's a ballsy play though, isn't it? If he says he dies at the end of day 1 and then he doesn't die, obv we're going to think he's scum and lynch him. Kind of early for mafia to sacrifice a 1 for 1, it will just burn them in the long run.
There's nothing really about the character that makes me think he would be insane or paranoid or something, aside from him maybe being bit and dying. But yeah you can just kill me if he is an actual cop, but I am telling the truth.