I believe the last idea we had was for the Admins to create an
Incognito account (so no one would need to create valid e-mail addresses) AND 4-5 cop accounts (I'd stick with 3 and let the investigation run free-for-all for now, with the "cop" accounts being used only to make arrests, until the community grows larger, or the game's popularity does). Cops would be chosen the same way
Incognito is, by PM'ing the cop account, so the current cop would then shift the account to the new cop. This is to prevent the game from getting too easy, since not even Incog would know who the cops are. Of course, if a cop gets killed, he'd have to post an obituary or something, so the others know they're down one cop (and X arrests). I personally like where this is going.