I would take the basic premise to be that we are trying the "guilty party" with
the idea of "reasonable doubt".
I'm ok with "Agatha Christy" to the limit of fictional argument, but one would
have to give a stronger argument than the "Corax" to find a plausible definition
to a physical phenomena. After all, the whole point is to understand.
Please have a look at this. Corax. Its is quite similar to the game that you have mentioned.
http://lumiere.ens.fr/~alphapsy/blog/?2006/10/11/84-coraxed