Someone in Springfield is killing people, the question is who the serial killer is. Following the assassinations of Eddie, Nick Riviera, Dewey Largo and the entire Fit Fat Tony mob. Quimby decides to take 2 steps after it is clear that there is a mass murderer in the city, emergency is declared and an investigation office is set up. Team members are Chester Turley (Snake Jailbird), Rich Texan, Homer, Apu Nahasapeemapetilon, Dr. Julius Hibbert, Captain Horatio McAllister, Drederick Tatum, Herman Hermann, Rainier Luftwaffe Wolfcastle, Lenny and Carl. During the investigation, the team tries to obtain evidence, but the killer is always ahead, and Citizens die, including Lindsey Naegle, Hans Moleman, Gil Gunderson, Jeremy Freedman, Sam and Larry from Moe's Pub. The team compiles a list of suspects: Flanders, Cletus Spuckler, Skinner, Sanjay, Kirk Van Houten, Clancy Wiggum, Jeff "Comic Book Guy" Albertson, Kumiko Nakamura, Moe Szyslak, Luigi Risotto, Akira Kurosawa, Ruth Powers, Sideshow Bob and Judge Constance Harm. After deaths of Sanjay and Ruth Powers, the list narrowed. Hidden camera reveals that Wiggum, Comic Book Guy and Kirk Van Houten broke into Lard Lad Donuts at the time of the murder. Another dead is Constance Harm. When Herbert Powell was killed, he wrote the letters JP with blood. Janey Powell? No! JP means Japan. Kumiko or Akira? Akira isn´t the killer because he is not Japanese, but Okinawan. Akira cheated on Comics Book Guy with Akira. Killer is Yutaka Nakamura.
