Create a large circle for the group to be seated in and select a detective. Once chosen, have that person leave the room. With the rest of the group, select a murderer. Ensure everyone takes note of who this person is and remembers them. Now that all characters have been selected, bring the detective back into the room and have them stand in the middle of the circle for game commencement.  
The aim of the game is for the murderer to strategically look at people within the group and eliminate them by winking without the detective noticing. 
Once players have been eliminated, they must lay down on the group so its visably clear who from the group is still left in the game. The detective will have 3 attempts at guessing who the murderer is. If all attempts are used but no murderer has been discovered, the game is over and the murderer wins. If all people within the group are eliminated before the detective finds out who the murderer is, the game is over and the murderer has won. 
Once the rounds are over, select a new detective and murderer to ensure others get involved and have a turn.