"I believe he may have been involved in another smaller case although I'm not entirely sure." You slow your speech down as you talk, focusing on processing the little information you've been given. "At any rate the notes alone may prove sufficient for capturing the culprit."
The next day you have the files on your computer. The police records however do not seem to hold any useful information. You take a bit of the chocolate cake Watari has given you as you begin to read the letters that were sent to the victims' homes. Each one has a different message on it. You begin to read the first.
This one will be the first of a few I presume. Just a little while ago, a thought passed my mind. My, it was an excellent thought. Everyday I think about how good it was now. So good it was I put it into action. The thought was that perhaps I hated this life so much because I was bored and needed to do something exciting, or maybe even dangerous. Really the best way to do this was to become a criminal, excitement is what you get when you run through fire so that is what I'm doing. 2 weeks ago it was now as there was a lot of planning.
The note ended and Watari stands next to you now as you remain sat on the floor.
"Do you see anything?" Watari asks.
"Maybe there's a hidden message there, there's no point writing all that for nothing, he's risking being caught." Then an idea occurred to you. "Maybe he wants to be caught."
What's the purpose of the message:
There's a code hidden in it. (Chapter 6)
There's no reason really, the criminal is simply mad (Chapter 7)
They wanted the excitement of risking being caught (Chapter 8)