You are in jail, along with all other Puzzling Exchange users, for crimes against each other with your obtuse riddling and mathematical references. One day, there is a large brouhaha at the prison, and the guards bring everyone to the cafeteria for an important announcement.
A small man in a suit stands up and announces that he is the new warden. The previous warden (who was known for his whimsical decisions on who should be left free or should die, despite any laws of the local government which may indicate otherwise) was murdered, with a set of colored hats sitting next to him on his desk.
The new warden announces that, unlike previous wardens who shamelessly flaunted the criminal justice system in their attempts at probability conundrums, he cannot let anyone die or go free. However, whoever can discover the murderer will receive some well-deserved reputation points on Puzzling Exchange. Not too shabby.
The only clue at the scene was the previous warden's computer, open to his browser history. It had been previously cleared, and then eleven interesting web pages had recently been visited. Within those eleven web pages, there were three recent visits to search pages, but it appears that there was no navigation away from those pages.
Below are the eleven visited web pages, with the most recent at the bottom.
- How long has the warden been the warden? v2
- Prison Pizza Party
- Three mathematicians are forever in Prison
- How long has the warden been the warden?
- One hundred and one hats
- Google home page
- The Switch Riddle
- The Two Switches
- Yahoo home page
- Bing home page
Who has been punishing us with these prisoner questions?
What if I told you that the last user had searched for "kippered fish" on the 3 search pages.
The investigators find a slip of paper under the keyboard with the number 2851743 on it. It is not written in the deceased warden's hands.
If the puzzles were listed in a different order, the piece of paper under the keyboard would most likely be different.
The culprit is not one of the linked users, but can be found among them.
The steganography tag pertains to all of the linked puzzles (as a whole), as opposed to applying to this particular puzzle.
Note: The user kippered-fish-2851743 is absolutely NOT related to this question. It appears to have been created by someone else trying to solve the puzzle.