I pick 2 murderers, and 4 detectives working in pairs. The murderers will tell me who they're murdering. I'll PM the victim they're gone, then write that the murder's happened. A clue is always left behind. The detectives have to figure out who's the murderer. They tell me who they think it is through PM. If they're right, the murderer is caught. If they're wrong, then the park guests can decided whether to change the detective or not, and if they want to change, who to change it to. The park guests can post on the thread who they think the murderers are, but if they're correct, they could be murdered next... If it doesn't look too suspicious

If they post a correct guess, it doesn't count to solving the murder, but the detectives could be influenced by what they say.