Investigating the Swiss Army Knife

You have decided to investigate the Swiss Army knife that was used to pin the note to Tim's door. (Hey, if you want to know more about these cool knives, visit Swiss Army Knives) You realise that there must be some significance to its being used, since a tack pin would have done the job just as well. Talking to Tim over a can of Coke in the tutors' room, you ask him whether he knows of any reason the black Swiss Army knife had been used. Tim's colleague Phil happens to be in the room at the time, and makes a valuable contribution to your investigation. He says that black ones are only available within Switzerland, so it must have been a special knife, jokingly asking if he could have it. He also says, "Funny that I should be saying all this, because I had an extremely similar conversation with some of the demonstrators a few weeks ago."

Little warning bells start going off in your head. It has to have been one of the demonstrators behind this insidious mess. Any of the demonstrators working on Tuesday morning would have had the means and the opportunity to put the note up. A demonstrator would probably also have greater access than any other students to the various servers on campus since they are further along in their studies, and would also have the know-how to send (virtually) untraceable emails bounced off these servers and to delete time traces on the messages. On top of all of this, you now know that the topic of Swiss Army knives had been broached recently. This may have given the culprit some reason to use it, even if it was a waste of a perfectly good knife!

Logic tells you that it must be one of the five demonstrators who were working around the time that the note was found. Can you trust your intuition and logic, though? Remember you still have no concrete evidence. Perhaps it is wiser to go back to another of the initial options like the Printers or the Rat, and try to gather some concrete evidence. Alternatively, you could start investigating the demonstrators.