Just suppose you worked in the Chicago Subway System Lost and Found. Its a boring place to be sure, almost no one goes there to retrieve their lost belongings. Maybe you would get bored and start looking through the stuff. A black leather diary might seem interesting. If you read it, you would discover that it contained detailed descriptions of brutal animal mutilations, huge fires, and maybe plans for a murder. A little research at the library might confirm that the fires and animal mutilations were real... Could you stop the murder? Would you put yourself in danger to do it?