Wiggum: Hey, where is Sideshow Bob and that guy who, uh, eats
people and takes their faces?
Prisoner #4: I'm right here, chief!
Wiggum: Oh. Then where's Sideshow Bob?
Prisoner #5: Ehh, he ran off.
Wiggum: Oh, great. Well, if anyone asks, uh...I beat him to death,
OK?
Lou: Right.
-- The most likely explanation,
"Sideshow Bob's Last Gleaming"