Dream Ledger for Me not You

I was sitting in my living room with my brothers when somebody knocked at the door. One of my brothers answered it, and let two people in. One was a police officer, the other was a girl I know. They asked me if they could speak to me privately. We went back outside, and into the backyard. They showed me some notes that they had found a several different crime scenes. They were bizarrely worded and seemed to make no sense at first. Then I realised that it was meant to look like that. I had a friend back in highschool who was a bit crazy, and he wrote stuff like this all the time. I only remember one line, it said something like "The giraffe's neck isn't long enough to reach the back rows." I started guessing the meaning behind the note, and they agreed with my assessment. They asked me to be a paid consultant for their Law Enforcement Agency. I agreed, and I woke up as they were filling me in with the particulars of the case.