This is the second of several polls given throughout the game. Anyone can vote - even if they aren't playing. It is hoped they will at least read the script.
So, based on the script in the game thread
http://www.simplyscripts.net/cgi-bin/Blah/Blah.pl?m-1346472763/Which character do you think is the Killer?
If the majority gets it right the Killer will change and a special order will be sent for that character's execution. If the majority get it wrong, then nothing will change.
The computer is there as kind of a none of the above (so I can vote).
The next poll will be during Georges turn. That poll will determine who we resurrect.