Hypocop

[Primate]

There was a game where this was used here, as well, I believe. It was something like sanity mafia, and it ended up working quite well.

Not really. TDA had to say he hadn't submitted a result one night, making it obvious that he was a cop.

[Primate]

Nah. Just do kill the three going against you as suspected cops. It shouldn't be hard to wifom your way out of something as flimsy as that.

EDIT:- I agree with Yos that the biggest weakness with this is the amount of people who won't care about fabricating plausible results. If you put the time in, you could shave off half the town from cop consideration based on that alone.