@crocobaura that is a great idea. I was originally thinking of something similar to when people go to those murder, mystery dinner or weekend parties. They are told a fictional person has been murdered and they have to work out who murdered them and how and where the murder happened. But the whole thing is actors and the people going on the weekend or dinner party are the ones who solve it in teams or something. Therefore no one is murdered it is just like playing Clue but in first-person, rather as a board game.
But I really like your urn idea and the possibilities behind the death.