This is similar to <a href=Mafia>Mafia</a>.

It was originally a Russian game called Ubiitca, which translates(?) 
as "Muderer." In Ubiitca, there is not night, and the lone murderer 
kills by "winking" at his victim during the "day." The victim, seeing 
the wink, must say "ouch" and die.  The game was also played with a
detective, and presumably has voting to find the murderer - see the
Mafia rules for a better understanding.